All poster presentations will take place during one of two poster sessions to be held in LaSalle A of the Hotel Inter-Continental.   Poster presenters should be available to discuss their posters during the reception for the session to which they are assigned, Wednesday 6:00-9:00 PM or Friday 6:30-9:30 PM.  First session posters should be put up from 11:00 AM-1:00 PM Wednesday, and taken down by 6:00 PM Thursday.  Second session posters should be put up from 11:00 AM -1:00 PM Friday, and taken down by noon on Saturday.  Maximum size for posters is 4 ft. by 4 ft.  Please bring your own thumbtacks.  Refreshments, including a cash bar, will be available at both poster sessions.  Neither the participating societies nor the Local Committee is responsible for any posters left after 12 noon on Saturday, 28 Sep.

• Poster Session I (Wednesday, 25 Sep 2002, 18:00 - 21:00 , LaSalle - A)

 
• Poster Session II (Friday, 27 Sep 2002, 18:30 - 21:30, LaSalle - A)

419 Microsatellite analysis of alternative reproductive strategies in a predominantly monogamous columbiform:  Mourning Doves.  LETITIA M. REICHART, School Biol. Sci., Washington State Univ., Pullman, WA; DAWN A. SHERRY, Dept. Fish. & Wildl., Texas A & M Univ., College Station, TX; ANTHONY J. NASTASE, Dept. Biol., Indiana Univ. PA, Indiana, PA; and DAVID F. WESTNEAT, School Biol. Sci., Univ. Kentucky, Lexington, KY.

420 The use of color infrared photography as an indicator of primary productivity and invertebrate abundance at migration stopover sites of the Western Sandpiper.  ANDREA C. POMEROY, Centre Wildl. Ecol., Dept. Biol., Simon Fraser Univ., Vancouver, BC, and ROB W. BUTLER, Centre Wildl. Ecol. and Canadian Wildl. Serv., Delta, BC.

421 Field-testing cognitive differences between migratory and non-migratory Dark-eyed Juncos:  a homing experiment.  JEFFREY T. KEISER and DANIEL A. CRISTOL, Dept. Biol., Coll. William & Mary, Williamsburg, VA.

422 Landscape patterns and wintering grassland birds in the Concho Valley, Texas.  DAWN R. MAGNESS, SALLIE J. HEJL and R. NEAL WILKINS, Dept. Wildl. & Fish. Sci., Texas A&M Univ., College Station, TX.

423 Strategies for conservation of winter habitat of Golden-cheeked Warbler in highlands of Chiapas, Mexico.  EFRAIN CASTILLEJOS-CASTELLANOS, Pronatura Chiapas, Chiapas, México.

424 Breeding outcome of Common Yellowthroat within a river corridor under recreational pressure.  CHRISTOPHER D. ANDERSON, Kansas Coop. Fish & Wildl. Res. Unit, Kansas State Univ., Manhattan, KS; C. DUSTIN BECKER, Dept. Hort. For. & Rec. Res., Kansas State Univ; PHILIP S. GIPSON, Kansas Coop. Fish & Wildl. Res. Unit, Kansas State Univ.; BRETT K. SANDERCOCK and DAVID A. RINTOUL, Div. Biol., Kansas State Univ.

425 Swainson's Thrush survival:  at the nest, post-fledging, annual juvenile and adult.  JENNIFER D. WHITE, Div. Biol. Sci., Univ. Missouri, Columbia, MO, THOMAS GARDALI, DANIEL C. BARTON, Point Reyes Bird Observ., Stinson Beach, CA, and JOHN FAABORG, Div. Biol. Sci., Univ. Missouri.

426 Hatching success and nest-site characteristics of Salton Sea Snowy Plovers.  KATHY C. MOLINA, Nat. Hist. Mus. Los Angeles Co., Los Angeles, CA.

427 The demise of vultures in southern Asia:  research and conservation recommendations for Africa.  MARK D. ANDERSON, Dept. Agric., Land Reform, Env. & Cons., Kimberley, South Africa; PETER J. MUNDY, Famona, Bulawayo, Zimbabwe; and MUNIR A. VIRANI, The Peregrine Fund, Nairobi, Kenya.

428 Observer effort is not equal:  spatial and temporal variation in Christmas Bird Count effort corrections.  ANDREW FARNSWORTH, Natl. Audubon Soc., New York, NY, and WESLEY M. HOCHACHKA, Lab. Ornithol., Cornell Univ., Ithaca, NY.

429 Holding time effects, due to banding, on migrant birds during fall migration.  JEFFREY W. FARRINGTON, Dept. Biol. Sci., Univ. Southern Miss., Hattiesburg, MS.

430 Patterns in Northern Cardinal plasma cholinesterase enzyme activity and relationship to condition index and fluctuating asymmetry.  JONATHAN D. MAUL and JERRY L. FARRIS, Environ. Sci. Prog., Arkansas State Univ., State University, AR.

431 Dispersal patterns and habitat use of Ferruginous Pygmy-Owls in southern Arizona.  RENEE L. WILCOX and MICHAEL F. INGRALDI, Research Branch, Arizona Game & Fish Dept., Phoenix, AZ.

432 Studies of long distance movements with satellite telemetry.  KIRK BATES, MIKE YATES, Raptor Res. Center, Boise State Univ., Boise, ID, and MARK FULLER, U.S. Geol. Surv., For. & Range. Ecosys. Sci. Center, Boise, ID.

433 The effects of the color of light on the magnetic orientation of the Bobolink.  ROBERT C. BEASON, Dept. Biol., Univ. Louisiana, Monroe, LA.

434 Detecting bird populations from an unmanned aerial vehicle.  LEONARD G. PEARLSTINE, Ft. Lauderdale Res. & Edu. Center, Univ. Florida, Davie, FL, H. FRANKLIN PERCIVAL, Florida Coop. Fish & Wildl. Res. Unit, Univ. Florida, Gainesville, FL; AMR ABD-ELRAHMAN, Dept. Civil & Environ. Eng., Univ. Central Florida, Orlando, FL; PETER G. IFJU, Dept. Aerospace Eng., Mech. & Eng. Sci., Univ. Florida, Gainesville, FL, and BON A. DEWITT, Dept. Civil Eng., Univ. Florida, Gainesville, FL.

435 Carotenoid plumage reflectance and reproductive success of American Redstarts.  BRITTNEY M. HEMBA, JEN C. OWEN and ROBERT J. SMITH, Dept. Biol. Sci., Univ. Southern Mississippi, Hattiesburg, MS.

436 Raptors drowning in farm reservoirs in southern Africa.  MARK D. ANDERSON, Dept. Agric., Land Reform, Env. & Cons., Kimberley, South Africa; ABRIE W. A. MARITZ, Raptor Conserv. Group, Olifantshoek, South Africa; and ENRICO OOSTHUYSEN, Dept. Agric., Land Reform, Env. & Cons., Springbok, South Africa.

437 Studying bird migration with thermal imaging (TI) and fixed-beam vertically pointing radar (VPR).  SIDNEY A. GAUTHREAUX, Jr., CARROLL G. BELSER and JENNY E. MICHI, Dept. Biol. Sci., Clemson Univ., Clemson, SC.

438 Patterns of pre-dawn singing in Buff-breasted Flycatchers.  M. ROSS LEIN, Dept. Biol. Sci., Univ. Calgary, Calgary, AB; and VALERIE A. HAINES, Dept. Sociol., Univ. Calgary.

439 Habitat relationships among wintering birds in urban parks.  ZACHARY A. KAHN and JOAN L. MORRISON, Dept. Biol. Trinity Coll., Hartford, CT.

440 Bird and mammal distribution maps:  a new resource for Neotropical zoologists.  BRUCE E. YOUNG, NatureServe, Arlington, VA.

441 Effects of bioaccumulative contaminants on intestinal flora of Bald Eagles and domestic chickens.  FAITH E. WILEY, H. FURMAN CANTRELL, WILLIAM W. BOWERMAN, Dept. Environ. Tox., Clemson Univ., Pendleton, SC, and WILLIAM C. BRIDGES, Dept. Exp. Stat., Clemson Univ.

442 Evolution of a citation.  RICHARD C. BANKS, USGS-PWRC, U.S. Natl. Mus., Washington, DC.

443 Effects of larval Protocalliphora (Diptera:  Calliphoridae) on reproductive success of secondary cavity-nesting birds.  DARRELL W. POGUE, Dept., Biol., Univ. Texas, Tyler, TX.

444 Breeding biology of grassland birds in western New York:  management implications.  CHRISTOPHER J. NORMENT, Dept. Biol. Sci., SUNY Brockport, Brockport, NY.

445 Spatial synchrony in bird populations linked to synchronous insect fluctuations and regional climatic variation.  JASON JONES, PATRICK J. DORAN and RICHARD T. HOLMES, Dept. Biol. Sci., Dartmouth Coll., Hanover, NH.

446 Comparing infestation rates of a chigger mite (Acarina:  Trombiculidae) on resident and migratory birds in coffee agroecosystems of Chiapas, Mexico.  THOMAS V. DIETSCH, School Nat. Res. & Environ., Univ. Michigan, Ann Arbor, MI.

447 Effects of hunter preference on observed sex and age ratios of harvested Mallards and American Black Ducks in eastern Canada.  JEAN-FRANÇOIS GOBEIL, Natl. Wildl. Res. Center, Canadian Wildl. Serv., Hull, PQ.

448 Selective use of nest-lining materials by Burrowing Owls.  MATTHEW DENMAN SMITH and COURTNEY J. CONWAY, Arizona Coop. Fish & Wildl. Res. Unit, Univ. Arizona, Tucson, AZ.

449 Abundance and conservation status of vultures in the former Soviet Union.  TODD KATZNER, Dept. Biol., Arizona State Univ., Tempe, AZ, SERGEI SKLYARENKO, Inst. Zool., Almaty, Kazakhstan. ALEXANDER GAVASHELISHVILI, Georgian Center Conserv. Wildl., Tbilisi, Georgia, MICHAEL McGRADY, Nat. Res., Ltd., Krems, Austria, and KEITH BILDSTEIN, Hawk Mountain Sanctuary, Kempton, PA

450 Phylogeny for species in the family Rallidae, based on mitochondrial and nuclear gene sequences.  BETH SLIKAS, Mus. Vert. Zool., Univ. California, Berkeley, CA, STORRS L. OLSON and ROBERT C. FLEISCHER, Smithsonian Inst., Washington, DC.

451 Roost location patterns and roost characteristics of young American Crows.  KEVIN J. McGOWAN, Cornell Lab. Ornithol, Ithaca, NY; ANNE B. CLARK, Dept. Biol., Binghamton Univ., Binghamton, NY; JENNIFER SENECAL, New York State Dept. Health, Ithaca, NY; RACHEL CURTIS, Cornell Lab. Ornithol., and DOUGLAS A. ROBINSON, Jr., Dept. Biol., Binghamton Univ.

452 Stopover migration sites used by Great Lakes' Piping Plovers.  VANESSA K. POMPEI, Conserv. Biol. Prog., Univ. Minnesota, St. Paul, MN; and FRANCESCA J. CUTHBERT, Dept. Fish. & Wildl. and Conserv. Biol., Univ. Minnesota, St. Paul, MN.

453 Nesting ecology of grassland birds on reclaimed surface-mined lands.  THOMAS P. DIXON and ROEL R. LOPEZ, Dept. Wildl. & Fish. Sci., Texas A&M Univ., College Station, TX.

454 Recruitment and the spatial organization of Surf Scoter populations during winter in the Strait of Georgia, British Columbia.  SAMUEL A. IVERSON, Centre Wildl. Ecol., Simon Fraser Univ., Burnaby, BC.

455 *The effects of forest fragmentation on post-fledging survival and dispersal of a forest songbird.  SCOTT A. RUSH, Dept. Biol., York Univ., North York, ON.

456 *Patterns of salt marsh use by wading birds in Rhode Island.  CAROL L. TROCKI and PETER W. C. PATON, Dept. Nat. Res. Sci., Univ. Rhode Island, Kingston, RI.

457 Using orientation experiments to determine natal origins of fall migrants at Long Point, Ontario. MARTHA L. ALLEN, Watershed Ecosys. Grad. Prog., Trent Univ., Peterborough, ON; ERICA NOL, Biol. Dept., Trent Univ., Peterborough, ON; and DAVID HUSSELL, Ontario Min. Nat. Res., Peterborough, ON.

458 Habitat use and population monitoring of Buff-breasted Sandpipers.  CLINTON W. JESKE, WAYNE NORLING, PAUL C. CHADWICK, W. BARROW and S. WILSON, Nat. Wetlands Res. Center, Lafayette, LA.

459 The response of Black Guillemots to recent warming trends in the western Arctic.  GEORGE J. DIVOKY, Inst. Arctic Biol., Univ. Alaska, Fairbanks, AK.

460 "New" migration patterns in Ruby-throated Hummingbirds.  BILL HILTON Jr., Hilton Pond Center for Piedmont Nat. Hist., York, SC.

461 Nocturnal habitat use by American Woodcock wintering in east Texas.  JEFFREY P. DUGUAY, J. R. GLENN and R. MONTAGUE WHITING, Jr., Arthur Temple Coll. For., Stephen F. Austin State Univ., Nacogdoches, TX.

462 Nest site characteristics and resource partitioning among three dove species in Mason, TX.  HEATHER A. MATHEWSON, Dept. Wildl. & Fish. Sci., Texas A&M Univ., College Station, TX; T.WAYNE SCHWERTNER, Texas Parks & Wildl., Mason, TX, and NOVA J. SILVY, Dept. Wildl. & Fish. Sci., Texas A&M Univ.

463 Sex and geographic variation in body size of Long-billed Curlews.  BRUCE D. DUGGER, Dept. Fish. & Wildl., Oregon State Univ., Corvallis, OR, and DENNIS M. FORSYTHE, Biol. Dept., Citadel, Charleston, SC.

464 *Winter territoriality and site fidelity among California Towhees.  LAURYN BENEDICT and WALTER D. KOENIG, Mus. Vert. Zool. and Dept. Integrat. Biol., Univ. California, Berkeley, CA.

465 Organochlorine pesticide contamination in Nearctic resident birds.  JEFF HORVATH, R. GIVEN HARPER, Dept. Biol., Illinois Wesleyan Univ., Bloomington, IL; ANGELO CAPPARELLA, Dept. Biol. Sci., Illinois State Univ., Normal, IL; JEFF FRICK, Dept. Chem., Illinois Wesleyan Univ., JOHN GERWIN and REBECCA BROWNING, North Carolina State Mus. Nat. Sci., Raleigh, NC.

466 Genetic diversity and structure in the Gadwall.  JEFFREY L. PETERS and KEVIN E. OMLAND, Dept. Biol. Sci., Univ. Maryland, Baltimore Co., Baltimore, MD.

467 Distribution, abundance, and nesting of California Black Rail in the San Francisco Bay Region in relation to habitat and landscape characteristics.  HILDIE SPAUTZ, NADAV NUR and DIANA STRALBERG, Point Reyes Bird Observ, Stinson Beach, CA.

468 Hermit Thrushes disperse pondberry, an endangered plant species.  PAUL B. HAMEL, CARL G. SMITH III, R. MARGARET S. DEVALL and NATHAN M. SCHIFF, USDA For. Serv., Southern Res. Sta., Stoneville, MS.

469 A long-term study of extrapair paternity in the Splendid Fairy-wren.  MICHAEL WEBSTER, School Biol. Sci., Washington State Univ., Pullman, WA; KEITH TARVIN, Dept. Biol., Oberlin Coll., Oberlin, OH; ELAINA TUTTLE, Dept. Life Sci., Indiana State Univ., Terre Haute, IN; and STEPHEN PRUETT-JONES, Dept. Ecol. & Evol., Univ. Chicago, Chicago, IL.

470 Bluethroats arrive on their breeding grounds with surplus fat stores:  test of the Time-Constraint Hypothesis.  JEFFREY MOLLENHAUER, FRANK MOORE, Dept. Biol. Sci., Univ. Southern Mississippi, Hattiesburg, MS; and ROLAND SANDBERG, Dept. Animal Ecol., Lund Univ., Lund, Sweden.

471 Avian response to spring burning in the Sierra Nevada.  KAREN BAGNE, JOHN ROTENBERRY, Dept. Biol., Univ. California, Riverside, CA, and KATHRYN PURCELL, USDA For. Serv., Sierra Nevada Res. Center, Fresno, CA.

472 *Managing grassland birds on military installations in the eastern United States.  JAMES J. GIOCOMO and DAVID A. BUEHLER, Dept. For., Wild. & Fish., Univ. Tennessee, Knoxville, TN.

473 *Influence of landscape matrix, microclimate, and habitat on wintering birds in riparian forests. KELLY A. ATCHISON, Environ. Sci. Graduate Prog., Ohio State Univ., Columbus, OH, and AMANDA D. RODEWALD, School Nat. Res., Ohio State Univ.

474 *Osteological perspectives on the phylogeny of recent and fossil furnarioids.  SANTIAGO CLARAMUNT, Museo Nacional de História Natural, Montevideo, Uruguay.

475 *Is songbird breeding territory selection influenced by nest predation and brood parasitism risk?  KIRSTEN R. HAZLER, Warnell School For. Res., Univ. Georgia, Athens, GA.

476 *Effects of female condition on reproductive success in Tree Swallows.  JACQUELINE K. NOOKER, PETER O. DUNN and LINDA A. WHITTINGHAM, Dept. Biol. Sci., Univ. Wisconsin-Milwaukee, WI.

477 *Using long-term bird banding data to estimate population trends of migrant landbirds.  JASON E. OSENKOWSKI and PETER W. C. PATON, Dept. Nat. Res. Sci., Univ. Rhode Island, Kingston, RI.

478 *Effects of an intense winter fire on Florida Scrub-Jay habitat use.  CHRISTOPHER D. VALLIGNY, ROBERT L. CURRY, Dept. Biol., Villanova Univ., Villanova, PA, and GLEN E. WOOLFENDEN, Archbold Biol. Sta., Venus, FL.

479 Comparative use of longline oyster beds and adjacent tidal flats by shorebirds on Humboldt Bay, California.  LINDA M. C. MOORE and MARK A. COLWELL, Dept. Wildl., Humboldt State Univ., Arcata, CA.

480 Abundance of spring staging Black Brant throughout the Pacific Flyway in relation to eelgrass abundance and site isolation.  JEFFREY E. MOORE and JEFFREY M. BLACK, Dept. Wildl., Humboldt State Univ., Arcata, CA.

481 An experimental comparison of double-observer and removal modeling for estimating bird abundance.  DANIEL M. SCHEIMAN, JEFFREY E. MOORE and ROBERT K. SWIHART, Dept. For. & Nat. Res., Purdue Univ., West Lafayette, IN.

482 ABC's Cats Indoors! Campaign.  LINDA WINTER, American Bird Conservancy, Washington, DC.

483 Prediction of bird community composition based on ecological niche modeling, and implications for biodiversity conservation in the Balsas Basin, Mexico.  T. PATRICIA FERIA A., Dept. Biol., Univ. Missouri-St. Louis, St. Louis, MO, and A. TOWNSEND PETERSON, Nat. His. Mus., Univ. Kansas, Lawrence, KS.

484 Tracking local movements of Bonaparte's Gulls on the Niagara River:  a radio telemetry study.  GLENN C. BARRETT, Canadian Wildl. Serv., Environment Canada, Burlington, ON; DAN deROOS, Lower Great Lakes Fisheries Resources Office, U.S. Fish & Wildl. Serv., Amherst, NY; CHIP WESELOH, G. E. JOHN SMITH, TANIA HAVELKA, Canadian Wildl.Serv., Environment Canada, Downsview, ON; and CYNTHIA PEKARIK, Canadian Wildl. Serv., Environment Canada, Burlington, ON.

485 Using satellite transmitters to track movements of Herring Gulls from the upper Great Lakes: 1999 - 2002.  GLENN C. BARRETT, Canadian Wildl. Serv., Environment Canada, Burlington, ON; BRADY POLLOCK, CAROLYN MATKOVICH and CHIP WESELOH, Canadian Wildl. Serv., Environment Canada, Downsview, ON.

486 Influence of foraging-perch habitat on Bald Eagles in west-central Illinois.  KELLY J. McKAY and GREGORY M. QUARTUCCI, Midwest Biol. Res. & Monitoring Inst., Hampton, IL.

487 Summary of Red-shouldered Hawk reproductive success along the Upper Mississippi River Valley, 1983 - 1997.  KELLY J. McKAY, Midwest Biol. Res. & Monitoring Inst., Hampton, IL; JON W. STRAVERS, Midwest Raptor Res. Fund, McGregor, IA; GARY V. SWENSON and CASEY J. KOHRT, U.S. Army Corps of Engineers, Rock Island Dist., Pleasant Valley, IA.

488 Developmental toxicity of PCBs for first and second generation American Kestrels.  KIM J. FERNIE, Canadian Wildl. Serv., Burlington ON; JUDIT SMITS, GARY BORTOLOTTI, Univ. Saskatchewan, Saskatoon, SK; KEN DROUILLARD, Univ. Windsor, Windsor, ON; and DAVID BIRD, Avian Sci. Conserv. Centre, McGill Univ., Ste. Anne de Bellevue, PQ.

489 *Complex vocalizations and song structure of Wedge-tailed Sabrewings.  CLEMENTINA GONZALEZ, JUAN FRANCISCO ORNELAS and LEONOR JIMENEZ; Dept. Ecol. y Comp. Animal, Inst. Ecologia, AC, Xalapa, Ver., Mexico.

490 *Use of artificial eggs to determine egg losses and predation in a Neotropical passerine.  WALTER S. SVAGELJ, MYRIAM E. MERMOZ, VALENTINA FERRETTI and GUSTAVO J. FERNÁNDEZ, Facultad de Ciéncias Exactas y Naturales, Universidad de Buenos Aires, Argentina.

491 Phylogenetic analysis of the 13 owl species with a special consideration to the Mimizuku.  SHI H. RYU, Dept. Biol., Kyungpook Natl. Univ., Daegu, Korea; UI W. HWANG, Dept. Biol., Teachers Coll., Kyungpook Natl. Univ., and HEE C. PARK, Dept. Biol., Kyungpook Natl. Univ.

492 *Nestling competition of sympatric cowbirds:  the role of gape and flange coloration.  HOPE R. McGAHA, Dept. Zool., Univ. Manitoba, Winnipeg, MB.

493 *Geomorphology, vegetation, and bird community in Atlantic forest fragments.  RÔMULO RIBON, Ecol. Cons. Man. Vida Silv., Univ. Fed. Minas Gerais, Belo Horizonte, MG, Brazil; MIGUEL ÂNGELO MARINI, Dept. Zoologia, Univ. Brasília, Brasília, DF, Brazil, and PAULO DE MARCO Jr., Depto. Biol. Geral., Univ. Fed. Viçosa, MG, Brazil.

494 *Defining thermoneutrality with a Bayesian model:  do open habitat birds have lower critical temperatures than forest species?  NATHANIEL E. SEAVY and TOSHINORI OKUYAMA, Dept. Zool., Univ. Florida, Gainesville, FL.

495 *Effects of incubation behavior on embryo metabolism.  CHRISTOPHER R. OLSON, CAROL VLECK and DAVID VLECK, Dept. Zool & Gen., Iowa State Univ., Ames, IA.

496 Extra-pair fertilization and effective population size in the Song Sparrow.  KATHLEEN D. O'CONNOR, AMY MARR and PETER ARCESE, Dept. Applied Conser. Res., Univ. British Columbia, Vancouver, BC.

497 Shorebirds feeding in mixed flocks in Fracasso Beach, Península Valdés, Argentina.  VERÓNICA L. D'AMICO, LUIS O. BALA and M. DE LOS ÁNGELES HERNÁNDEZ, CENPAT (CONICET) Puerto Madryn, Chubut, Argentina.

498 Protecting birds by conserving islands:  an integrated regional approach.  BERNIE TERSHY, Island Conserv. & Ecol. Group, Center Ocean Health, Univ. California, Santa Cruz, CA, DONALD CROLL, Conserv. & Ecol. Group and Ecol. & Evol. Biol., Univ. California, JOSE ANGEL SANCHEZ, Grupo de Ecol. y Conserv. de Islas, Mexico, BRAD KEITT, Island Conserv. & Ecol. Group, C. JOSH DONLAN, Conserv. & Ecol. Group, BILL WOOD, MIGUEL ANGEL HERMOSILLO, Grupo de Ecol. y Conserv., and GREGG HOWALD, Island Conserv., Canada.

499 Tail streamer function and sexual selection in the Red-tailed Tropicbird.  ALLISON C. VEIT and IAN L. JONES, Dept. Biol., Memorial Univ. Newfoundland, St. John’s, NF.

500 WildSpectra, a new program for real-time display and analysis of bird song.  R. HAVEN WILEY, Dept. Biol., Univ. North Carolina, Chapel Hill, NC.

501 *Reproductive success and nest site selection of Grasshopper Sparrow populations in southern West Virginia.  FRANK K. AMMER, Div. For., West Virginia Univ., Morgantown, WV, and PETRA BOHALL WOOD, West Virginia Coop. Fish & Wildl. Res. Unit, BRD/USGS, West Virginia Univ.

502 Begging and provisioning in Common Terns.  TASHA E. SMITH and MARTY L. LEONARD, Dept. Biol., Dalhousie Univ., Halifax, NS.

503 Naturalized parrots in California:  is "exotic" becoming "invasive?"  KIMBALL L. GARRETT, Nat. Hist. Mus. Los Angeles Co., Los Angeles, CA, and KAREN T. MABB, Dept. Biol. Sci., California Polytechnic Univ., Pomona, CA.

504 *Influence of human and climatic factors on naturalized parrot populations in California:  where will parrots become established next?  KAREN T. MABB, Dept. Biol. Sci., California State Polytech. Univ., Pomona, CA.

505 Providing research experience for K-12 teachers:  an alternative way to connect to K-12 classrooms.  WENDY A. KUNTZ, Prog. EECB, Dept. Zool., Univ. Hawaii at Manoa, Honolulu, HI, and DONALD B.YOUNG, Coll. Edu., Univ. Hawaii at Manoa.

506 *Nest predation strategies:  how do Steller's Jays find nests?  STACEY VIGALLON and JOHN MARZLUFF, Coll. For. Res., Univ. Washington, Seattle, WA.

507 *Assessing the impacts of expanding Barred Owl populations on the Northern Spotted Owl in Olympic National Park, Washington.  SCOTT A. GREMEL, Coll. For. Res., Univ. Washington, Seattle, WA.

508 The influence of extra-pair behavior on spatial investment in nest defense.  PAUL A. CALLO, Dept. Biol., Univ. Maryland, College Park, MD.

509 The role of birds and the importance of microsites in the regeneration of south-temperate rainforest.  MICHAEL P, MILLESON and KATHRYN E. SIEVING, Dept. Wildl. Ecol. & Conserv., Univ. Florida, Gainesville, FL.

510 Bird communities and silvicultural systems in a yellow birch-balsam fir ecosystem.  MARCEL DARVEAU, CAROLINE GIRARD, Dep. sc. bois et foret, Univ. Laval, Quebec, PQ, JEAN-PIERRE SAVARD, Serv. can. faune, Quebec, PQ, and JEAN HUOT, Dep. biologie, Univ. Laval

511 Effects of clearcutting on the spatial arrangement of breeding bird territories.  WENDY K. GRAM, Oklahoma Mus. Nat. Hist., Univ. Oklahoma, Norman, OK; PAUL A. PORNELUZI, Div. Sci. & Math, Central Methodist Coll., Fayette, MO; JOHN FAABORG, Div. Biol. Sci, Univ. Missouri, Columbia, MO, RICK L. CLAWSON and CRAIG D. SCROGGINS, Missouri Dept. Conserv., Columbia, MO.

512 Avian biodiversity associated with agricultural wetlands in southern Louisiana.  JAY V. HUNER and MICHAEL J. MUSUMECHE, Crawfish Res. Center, Univ. Louisiana at Lafayette, Lafayette, LA.

513 Habitat selection and reproductive success of Ash-throated Flycatchers along a desert environmental gradient.  TIMOTHY S. REDMAN, Dept. Biol., Univ. California, Riverside, CA.

514 Patterns of corticosterone secretion vary with energetic condition in Hermit Thrushes during autumn migration.  REBECCA HOLBERTON and JENNIFER LONG, Dept. Biol. Sci., Univ. Maine, Orono, ME.

515 Phylogeny of the herons of the world.  KEVIN G. McCRACKEN, Inst. Arctic Biol. and Dept. Biol. & Wildl., Univ. Alaska, Fairbanks, AK; and FREDERICK H. SHELDON, Mus. Nat. Sci., Louisiana State Univ., Baton Rouge, LA.

516 Suitability of mangrove habitat types to overwintering migratory birds in Puerto Rico.  LEONARD REITSMA, Dept. Nat. Sci., Plymouth State Coll., Plymouth NH, JOSEPH SMITH, WILLIAM DELUCA, ROBERT REITSMA and PETER P. MARRA, Smithsonian Environ. Res. Center, Edgewater, MD.

517 Is there evidence for continued female-female pairing in Western Gulls breeding on Santa Barbara Island?  CAROLINA PICKENS and GEORGE L. HUNT, Dept. Ecol. & Evol. Biol., Univ. California, Irvine, CA.

518       Vacant

519 Role of gonadal hormones in the pre-nuptial molt of American Goldfinch.  MEREDITH HUNTER and REBECCA HOLBERTON, Dept. Biol. Sci., Univ. Maine, Orono, ME.

520 *Why are there more migrants in the North?  an investigation of the geographic patterns of breeding bird species diversity within North America.  JEFFREY J. BULER and JEFFREY W. FARRINGTON, Dept. Bio. Sci., Univ. Southern Mississippi, Hattiesburg, MS.

521 Variation in Piping Plover foraging site quality in the Great Plains.  DANIELLE Le FER, JAMES FRASER, Dept. Fish. & Wildl., Virginia Tech, Blacksburg, VA, and CASEY D. KRUSE, U.S. Army Corps of Engineers, Gavins Point Project, Yankton, SD.

522 Examining the effects of interspecific competition between Barrow's Goldeneye and Bufflehead. MATTHEW R. EVANS, Centre Wildl. Ecol., Dept. Biol. Sci., Simon Fraser Univ., Burnaby, BC.

523 What is missing from San Clemente Loggerhead Shrike habitat?  SUELLEN LYNN, ERIC L. KERSHNER, Inst. Wildl. Stud., San Diego, CA; and DAVID K. GARCELON, Inst. Wildl. Stud., Arcata, CA.

524 New distributional records of bird fauna in the Sierra Gorda Biosphere Reserve, Queretaro, Mexico.  ROBERTO PEDRAZA-RUIZ, Grupo Ecological Sierra Gorda I.A.P., Jalpan, Queretaro, Mexico.

525 Toucan-generated seed shadows:  a preliminary study.  KIMBERLY M. HOLBROOK and BETTE A. LOISELLE, Dept. Biol., Univ. Missouri-St. Louis, St. Louis, MO.

526 Seasonal changes in clutch size of the San Clemente Sage Sparrow.  FREDERIC BEAUDRY, NICOLE M. MUNKWITZ and DAVID K. GARCELON, Inst. Wildl. Stud., Arcata, CA.

527 Are traditional methods of determining nest predators and nest fates reliable?  an experiment with Wood Thrushes using miniature video cameras.  GARY E. WILLIAMS and PETRA BOHALL WOOD, USGS BRD West Virginia Coop. Fish & Wildl. Res. Unit and Div. For., West Virginia Univ., Morgantown, WV.

528 Vacant

529 Spatial modeling of Hawaiian forest bird densities.  MARCOS GORRESEN, RICHARD J. CAMP, BETHANY L. WOODWORTH and THANE K. PRATT, Pacific Island Ecosys. Res. Center, USGS Biol. Res. Div., Hawaii Natl. Park, HI.

529b Population estimates, distribution and habitat associations for Hawaiian forest birds.  RICHARD J. CAMP, MARCOS GORRESEN, BETHANY L. WOODWORTH and THANE K. PRATT, USGS-BRD Pacific Island Ecosys, Res, Center, Hawaii Natl. Park, HI.

530 Variation in the respiratory quotient of Black-capped Chickadees.  SHELDON J. COOPER, Dept. Biol., Univ. Wisconsin-Oshkosh, Oshkosh, WI.

531 Development of polymorphic microsatellite markers that amplify across two eagle genera.  JOSEPH D. BUSCH, Dept. Biol., Northern Arizona Univ., Flagstaff, AZ, TODD E. KATZNER, Dept. Biol., Arizona State Univ., Tempe, AZ, EVGENY BRAGIN, Naurzum Zapovednik, Karamendy, Kazakhstan, and PAUL KEIM, Dept. Biol., Northern Arizona Univ.

532 Plumage color and feather bacteria in House Finches and Eastern Bluebirds.  MATTHEW D. SHAWKEY, SHREEKUMAR R. PILLAI, GEOFFREY E. HILL, SHARON D. ROBERTS and LYNN E. SIEFFERMAN, Dept. Biol., Auburn Univ., Auburn, AL.

533 A poster for the identification of Caspian Tern bill loads of the Pacific Coast.  PENNY SPIERING and DAVID CRAIG, Biol. Dept., Willamette Univ., Salem, OR.

534 Plant phenology affects foraging habitat choice of spring migrant warblers at a riparian stopover site.  LAURA J. McGRATH and CHARLES van RIPER III, USGS/FRESC Colorado Plateau Field Sta., Northern Arizona Univ., Flagstaff, AZ.

535 Incubation history and embryonic development in Boat-tailed Grackles.  NANCY J. CLUM, Environ. Sci., DePaul Univ., Chicago, IL; and MARION R. PREEST, Joint Sci., Claremont Coll., Claremont, CA.

536 Modeling Northern Spotted Owl watershed and nest-site occupancy in central coastal California.  KATIE FEHRING, DIANA STRALBERG, Point Reyes Bird Observ., Stinson Beach, CA; DAWN ADAMS, Point Reyes Natl. Seashore, CA; DAPHNE HATCH, Golden Gate Nat. Rec. Area, CA; NADAV NUR and LARS POMARA, Point Reyes Bird Observ.

537 Feeding habits of the Kelp Gull in Isla La Vieja in central Peru.  ESMERALDA FLORES, Univ. Nac. Agraria La Molina, Lima-Peru, and CARLOS ZAVALAGA, Dept. Biol. Sci., Univ. North Carolina at Wilmington, NC.

538 The one-gel genome:  the entire mitochondrial DNA sequence of the Whistling Swan.  JULIE FEINSTEIN, Am. Mus. Nat. Hist., New York, NY.

539 Annual survival estimation confounded by incomplete breeding site-fidelity:  study designs that may help.  MATTHEW R. MARSHALL, For. Res., Pennsylvania State Univ., University Park, PA; DUANE R. DIEFENBACH, USGS Pennsylvania Coop. Fish & Wildl. Res. Unit, Pennsylvania State Univ., LARRY A. WOOD and ROBERT J. COOPER, For. Res., Univ. Georgia, Athens, GA.

540 Productivity of the Aplomado Falcon in Chihuahua, Mexico.  ALBERTO MACIAS-DUARTE, The Peregrine Fund, Chihuahua, Mexico, ALBERTO LAFON-TERRAZAS, Universidad Autónoma de Chihuahua, Chihuahua, México; ANGEL B. MONTOYA, The Peregrine Fund, Boise ID; and ROBERT TAFANELLI, Border Wildl. Consultants, Las Cruces NM.

541 Habitat selection for nest cups in the genus Pluvialis at Nome, Alaska.  WHITNEY NEKOBA, Kurtistown, HI; PHILLIP L. BRUNER, ANDREA E. BRUNER and ROBERT N. WINGET, Dept. Biol., Brigham Young Univ. Hawaii, Laie, HI.

542 Choice of extra-pair mates by female Green-rumped Parrotlets.  COLIN HUGHES, Dept. Biol., Univ. Miami, Coral Gables, FL, STEVEN R. BEISSINGER, Dept. ESPM, Univ. California, Berkeley, CA, and REBECCA R. MELLAND, Dept. Biol., Univ. North Dakota, Grand Forks, ND.

543 Modeling apparent survival probability and reproductive output of California Spotted Owls using forest cover types.  JENNIFER A. BLAKESLEY, Dept. Fish. & Wildl. Biol., Colorado State Univ., Ft. Collins, CO.

544 Changes in avian community structure in a tidally restricted coastal wetland following salt marsh restoration.  PETER W. C. PATON, FRANCIS C. GOLET and DENNIS H. A. MYSHRALL, Dept. Nat. Res. Sci., Univ. Rhode Island, Kingston, RI.

545 *Future of Salton Sea birds in jeopardy?  MARK B. MENDELSOHN, WILLIAM I. BOARMAN and ROBERT N. FISHER, U.S. Geol. Surv., San Diego Field Sta., CA.

546 Use of artificial nest structures to mitigate Bald Eagle nest destruction.  SCOTT A. KIMBALL, MARC J. BECHARD, Dept. Biol. and Raptor Res. Center, Boise State Univ., Boise, ID, and GREGORY S. KALTENECKER, Idaho Bird Observatory, Dept. Biol., Boise State Univ.

547 Relationships between width of post-logging beach buffer strips and composition of forest bird communities of southeast Alaska.  MICHELLE KISSLING and EDWARD GARTON, Dept. Wildl. Res., Univ. Idaho, Moscow, ID.

548 *Multiple broods are better that extrapair mating in House Wrens.  NICOLE E. POIRIER, LINDA A. WHITTINGHAM and PETER O. DUNN, Dept. Biol. Sci., Univ. Wisconsin-Milwaukee, Milwaukee, WI.

549 Effects of climate on adult body condition, breeding ecology, and population size of Semipalmated Plovers in Churchill, Manitoba.  KATHERINE A. R. GRAHAM, Watershed Ecosys. Grad. Prog., Trent Univ., Peterborough, ON; and ERICA NOL, Biol. Dept., Trent Univ.

550 Temporal variation in Mexican Spotted Owl reproduction.  MYLEA L. PETERSBURG, CHRISTOPHER A. MAY, R. J. GUTIERREZ and MARK E. SEAMANS, Dept. Fish. Wildl. Cons. Biol., Univ. Minn., St. Paul, MN.

551 Foraging behavior, territoriality, nest placement, and nest success of American Avocets on saline vs. freshwater wetlands.  KELLY M. WELLS, Dept. Biol., Univ. Nebraska-Omaha, Omaha, NE.

552 Effects of alien rat predation and diseases on demography of the Oahu `Elepaio.  ERIC A. VANDERWERF, U.S. Fish & Wildl. Serv., Honolulu, HI.

553 Potential underlying mechanisms leading to the association of Burrowing Owls with agriculture.  COLLEEN E. MOULTON, JAMES R. BELTHOFF and RYAN S. BRADY, Dept. Biol. and Raptor Res. Center, Boise State Univ., Boise, ID.

554 Winter home range estimates of Henslow's Sparrows in coastal Mississippi.  BENNY S. THATCHER, DAVID G. KREMENTZ, USGS Arkansas Coop. Fish & Wildl. Res. Unit, Dept. Biol., Univ. Arkansas, Fayetteville, AR; and MARK S. WOODREY, U.S. Fish & Wildl. Serv., Jackson, MS.

555 Species or host races?  spatial and temporal genetic analysis of indigobird populations.  KRISTINA M. SEFC, Dept. Biol., Boston Univ., Boston, MA; ROBERT B. PAYNE, Mus. Zool., Univ. Michigan, Ann Arbor, MI, and MICHAEL D. SORENSON, Dept. Biol., Boston Univ.

556 Baiting and waiting:  use of dung as a tool by Burrowing Owls. DOUGLAS J. LEVEY, R. SCOTT DUNCAN and C. J. LEVINS. Dept. Zool., Univ. Florida, Gainesville, FL.

557 Patterns of temporal and geographical variation in prey selection and reproductive success by Crested and Least Auklets.  GAIL S. FRASER, Texas Inst. Ocean., Texas A&M Galveston, Galveston, TX, JEFFREY C. WILLIAMS, Alaska Maritime Natl. Wildl. Refuge, Homer, AK, IAN L. JONES, Dept. Biol., Memorial Univ. Newfoundland, St. John's, NF, FIONA M. HUNTER, Dept. Animal & Plant Sci., Sheffield Univ., LISA SCHARF, G. VERNON BYRD, Alaska Maritime Natl. Wildl. Refuge, and MARTIN RENNER, Memorial Univ. Newfoundland.

558 American Crow migration as a predictor of the spread of West Nile Virus in North America.  DAN TALLMAN, Northern State Univ., Aberdeen, SD, and
LON KIGHTLINGER, South Dakota Dept. Health, Pierre, SD.

559 Conservation implications of a variable prey base on Northern Goshawks in southeast Alaska.  STEPHEN B. LEWIS, Raptor Res. Center, Boise State Univ.,
Boise, ID; KIMBERLY TITUS, Alaska Dept. Fish & Game, Div. Wildl. Conser., Douglas, AK; and MARK R. FULLER, USGS For. & Rangeland Ecosys. Sci. Center - Snake River Field Sta., Boise, ID.

560 Survival rates of adult Northern Goshawks on the Tongass National Forest, southeast Alaska.  KIMBERLY TITUS, Alaska Dept. Fish & Game, Juneau, AK; CRAIG FLATTEN, Alaska Dept. Fish & Game, Ketchikan, AK; RICHARD LOWELL, Alaska Dept. Fish & Game, Petersburg, AK; and STEPHEN LEWIS, Alaska Dept. Fish & Game, Juneau.

561 *Northern Goshawk habitat selection in a Great Basin ecosystem.  KRISTIN W. HASSELBLAD, Dept. Biol., Boise State Univ., Boise, ID, and MARC J. BECHARD, Raptor Res. Center, Dept. Biol., Boise State Univ.

562 Effects of pond fish density, morphology and landscape features on the foraging ecology and nest site selection of Interior Least Terns.  A. C. KASNER and R. D. SLACK, Dept. Wildl. & Fish. Sci., Texas A&M Univ., College Station, TX.

563 Relationships between winter weather and trends in Northern Goshawk nesting territory occupancy and productivity.  GRAHAM D. FAIRHURST and MARC J. BECHARD, Dept. Biol., Boise State Univ., Boise, ID.

564 The physiological traits of Flammulated Owls and Northern Saw-whet Owls during fall migration:  an examination of the Migration-Modulation Hypothesis.  SARAH L. HAMILTON, Big Sur Ornithol. Lab. of Ventana Wilderness Soc., Big Sur, CA, PATRICIA J. HEGLUND, Dept. Biol., Univ. Idaho, ID, HUBERT SCHWABL, Dept. Biol., Washington State Univ., WA, and LYNDA LEPPERT, Dept. Biol., Boise State Univ., ID.

565 Range-wide population status and present-day hybrid zone of Golden-winged Warbler.  KENNETH V. ROSENBERG and SARA E. BARKER, Cornell Lab. Ornithol., Ithaca, NY.

566 Impacts of invasive exotic grasses on avian communities during the breeding season in south Texas.  ARON A. FLANDERS, WILLIAM P. KUVLESKY, Jr., Caesar Kleberg Wildl. Res. Inst., Texas A&M Univ. Kingsville, Kingsville, TX; DONALD C. RUTHVEN III, Texas Parks & Wildl. Dept., Artesia Wells, TX; and ROBERT E. ZAIGLIN, Piloncillo Ranch, TX.

567 An ornithological mystery solved: The Mascarene Starling Necropsar leguati is a Martinique Trembler.  ROBERT FLEISCHER, STORRS OLSON, Dept. Syst. Biol., Natl. Mus. Nat. Hist., Smithsonian Inst., Washington, DC; CLEMENCY FISHER, Liverpool Mus., UK; and ELDREDGE BERMINGHAM, Instituto Smithsonian de Investigaciones Tropicales, Balboa, Ancon, Republica de Panamá.

568 Correlations between food resource abundance and timing of songbird migration.  HOPE WOODWARD, Dept. Nat. Sci., Western New Mexico Univ., Silver City, NM.

569 The relationship of nest defense behavior to food availability and nest predation risk and the resulting fecundity consequences in Wrentits.  KRISTINE L. PRESTON, Dept. Biol., Univ. California, Riverside, CA.

570 Immunogenetic markers of "good genes" for a sexually-selected, parasite-dependent, male ornament in Wild Turkeys.  RICHARD BUCHHOLZ, Dept. Biol., Univ. Mississippi,  University, MS; MARY JONES, Dept. Biol., Univ. Louisiana-Monroe, Monroe, LA; STEVE HECHT, Grand Valley State Univ., Grand Valley, MI; and ANN FINDLEY, Univ.  Louisiana-Monroe.

571 Saguaro fruit:  an essential resource for Sonoran Desert birds?  BLAIR O. WOLF, Biol. Dept., Univ. New Mexico, Albuquerque, NM.

572 Breeding bird use on created tidal wetlands of southeast Virginia.  DAVID W. DesROCHERS, JASON C. KEAGY and DAN A. CRISTOL, Dept. Biol., Coll. William & Mary, Williamsburg, VA.

573 Modeling objectives and priorities for landbird conservation in the west Gulf Coastal Plain.  DEAN W. DEMAREST, Partners in Flight, Atlanta, GA, and R. RANDY WILSON, USFWS, Vicksburg, MS.

574 Predicting places of promise for Aplomado Falcons in the Chihuahuan Desert.  KENDAL E. YOUNG, DAWN M. BROWNING, QUINN H. HODGSON, JULIE L. LANSER, BRUCE C. THOMPSON and RAUL VALDEZ, Dept. Fish. & Wildl. Sci., New Mexico State Univ.  Las Cruces, NM.

575 Reproductive success in Swainson's Warblers:  assessing breeding habitat quality in bottomland hardwood forests and commercial pine plantations.  DONATA ROOME and THOMAS W. SHERRY, EE Biol. Dept., Tulane Univ., New Orleans, LA.

576 vacant

577 Ecology of bird mixed-species flocks in Atlantic forest fragments, southeastern Brazil.  MARCOS MALDONADO-COELHO, Depto. Biol., UFMG, Belo Horizonte, MG, Brazil, and Dept. Biol. & Internatl. Center for Tropical Ecol., Univ. Missouri, St. Louis, MO, and MIGUEL Â. MARINI, Depto. Biol., UFMG, Belo Horizonte, MG, Brazil and Depto. Zool., UNB, Brasília, DF, Brazil.
 

578 *Postfledging ecology of White-throated Robins.  EMILY B. COHEN, Dept. Zool., Michigan State Univ., and CATHERINE A. LINDELL, Dept. Zool. and Basic Sci. & Remote Sensing Initiative, Michigan State Univ., East Lansing, MI.

579 Habitat use patterns of wintering grassland birds in Chihuahua, Mexico.  CESAR MENDEZ-GONZALEZ, Dept. Fish. & Wildl. Sci., New Mexico State Univ., Las Cruces, NM; ALBERTO LAFON-TERRAZAS, Universidad Autonoma de Chihuahua, Mexico; and ANGEL MONTOYA, The Peregrine Fund.

580 Seed dispersal by birds contributes to Chinese tallow tree invasiveness in Louisiana and South Carolina.  WYLIE C. BARROW, Jr., USGS, Natl. Wetlands Res. Center, Lafayette, LA; IAN J. RENNE, Dept. Biol. Sci., Clemson Univ., Clemson, SC; LORI A. JOHNSON RANDALL and CLINT JESKE, Natl. Wetlands Res. Center.

581 *Nest site selection and the use of canopy gaps in three thrush species on an industrial forest.  RACHEL L. DELLINGER and PETRA BOHALL WOOD, West Virginia Coop. Fish & Wildl. Res. Unit and Div. For., West Virginia Univ., Morgantown, WV.

582 A new species of flightless sandpiper from Henderson Island, South Pacific.  MICHAEL R. DICKISON, Dept. Biol., Duke Univ., Durham, NC, and GRAHAM WRAGG, Ashburton, New Zealand.

583 Spatial patterns of habitat use by manakins (Pipridae) in a lowland wet forest in Ecuador: preliminary results from captures and spot-mapping.  BETTE A. LOISELLE, JOHN G. BLAKE and T. BRANDT RYDER, Dept. Biol. and Intl. Ctr. Trop. Ecol., Univ. Missouri-St. Louis, MO.

584 Phylogenetic relationships and character evolution in the kingbirds (Tyrannus).  JASON A. MOBLEY, Mus. Vert. Zool. and Dept. Integrat. Biol., Univ. California, Berkeley, CA.

585 *Colonization of eastern Brazil by the Cinereous Warbling-Finch, with some comments on its natural history.  RÔMULO RIBON, Ecol. Cons. Man. Vida Silv., Univ. Fed. Minas Gerais, Belo Horizonte, MG, Brazil and Museu de Zool. João Moojen de Oliveira, Univ. Fed. Viçosa, MG, Brazil.

586 Does marsh fragmentation affect Song Sparrow nest success?  DIANA STRALBERG, YVONNE CHAN, NADAV NUR, HILDIE SPAUTZ and JULIAN WOOD, Point Reyes Bird Observ., Stinson Beach, CA.

587 Linking breeding and wintering distributions of Southwestern Willow Flycatchers with stable Isotopes.  MATTHEW J. JOHNSON, USGS/Colorado Plateau Field Sta., Northern Arizona Univ., Flagstaff, AZ, and JEFFREY KELLY, USDA For. Serv., Rocky Mountain Res. Sta., Albuquerque, NM.

588 Predators of Southwestern Willow Flycatcher nests in central Arizona:  identification using time-lapse video cameras.  TRACY D. McCARTHEY and DARREN K. BOLEN, Arizona Game & Fish Dept., Phoenix, AZ.

589 Importance of habitat and food availability in site selection of Southwestern Willow Flycatchers.  SYLVIA L. SCHMIDT and JAMES D. FRASER, Dept. Fish. & Wildl. Sci., Virginia Tech, Blacksburg, VA.

590 Reproductive ecology of Tundra Swan in the Mackenzie Delta Region, Canada.  HEATHER A. SWYSTUN, RUSSELL D. DAWSON, Biol. Prog., Univ. Northern British Columbia, Prince George, BC; and JAMES E. HINES, Canadian Wildl. Serv., Yellowknife, NT.

591 Influence of geographic local on avian community structure and species dominance.  MICHAEL S. HUSAK and ERIC T. LINDER, Dept. Biol. Sci., Mississippi State Univ., Mississippi State, MS.

592 Life history studies of New World tropical parrots and their conservation.  KARL S. BERG, Dept. Biol. Sci., Florida Internl. Univ., Miami, FL, RAFAEL ANGEL and JACQUELINE SOCOLA, Fundacion Pro Bosque, Guayaquil, Ecuador.

593 Local at-sea distribution of breeding and non-breeding radio-marked Marbled Murrelets during the breeding season.  PEGGY P. W. YEN, Dept. Biol., Simon Fraser Univ., Burnaby, BC; and RUSSELL BRADLEY, Point Reyes Bird Observ., Stinson Beach, CA.

594 A regional monitoring program for the threatened Marbled Murrelet.  PATRICK G. R. JODICE, U.S. Fish & Wildl. Service, Portland, OR.

595 Characteristics of Marbled Murrelet nest trees and nest sites in the Pacific Northwest.  S. KIM NELSON, Oregon State Univ., Dept. Fish. & Wildl., Corvallis, OR; THOMAS E. HAMER, Hamer Environmental, Mt. Vernon, WA, AMANDA K. WILSON, Oregon State Univ., and DOUGLAS J. MEEKINS, Hamer Environmental.

596 Are Marbled Murrelet pairs at sea actually breeding pairs?  LAURA McFARLANE TRANQUILLA, PEGGY YEN, Centre Wildl. Ecol., Dept. Biol. Sci., Simon Fraser Univ., BC, RUSSELL BRADLEY, Point Reyes Bird Observ., Stinson Beach, CA, and BRETT VANDERKIST, Capilano Coll., Vancouver, BC.

597 New insights from LANDSAT 7 satellite imagery for the investigation of Marbled Murrelet nesting habitat in Desolation Sound, Canada.  SCOTT STEEBY, MRYKA HALL-BEYER, FALK HUETTMANN, Geog. Dept., Univ. Calgary, Calgary, AB, and DOV LANK, Simon Fraser Univ., Burnaby, BC.

598 *Age-related differential timing of spring migration within sexes in passerines.  REBECCA L. M. STEWART, Dept. Zool., Univ. Manitoba, Winnipeg, MB; CHARLES M. FRANCIS, Natl. Wildl. Res. Centre, Hull, PQ, and CHERYL MASSEY, Ontario Veterinary Coll., Univ. Guelph, Guelph, ON.

599 *Gyrfalcon diet in West Greenland during the nestling period.  TRAVIS BOOMS and MARK FULLER, Raptor Res. Center, Boise State Univ., ID.

600 *Host-parasite interactions between Shiny Cowbirds and Creamy-bellied Thrushes.  ANDREA A. ASTI É and JUAN C. REBOREDA, Dept. Biol. Sci., Univ. Buenos Aires, Buenos Aires, Argentina.

601 *Recovering DNA from molted raptor feathers for use in genotyping and mark/recapture analysis:  a work in progress.  SHELLEY BAYARD DE VOLO, GDPE, Colorado State Univ., Fort Collins, CO; MICHAEL F. ANTOLIN, Dept. Biol., Colorado State Univ.; RICHARD T. REYNOLDS, Rocky Mountain Res. Sta., Fort Collins, CO; and KENNETH P. BURNHAM, Colorado Coop. Fish & Wildl. Res. Unit, CO.

602 *Nest defense by Carolina Wrens.  KELLY A. D'ORAZIO and DIANE L. NEUDORF, Dept. Biol. Sci., Sam Houston State Univ., Huntsville, TX.

603 *Conservation tillage, providing source habitat for Horned Lark?  SANDRA B. CEDERBAUM, ROBERT J. COOPER and JOHN P. CARROLL, Warnell School For. Res., Univ. Georgia, Athens, GA.

604 *Song variation in a Dusky Flycatcher population in southwestern Alberta.  T. E. STEHELIN, Dept. Biol. Sci., Univ. Calgary, Calgary, AB.

605 GIS analysis of breeding density, nest site preferences, and population size of three diurnal raptors in southeastern Madagascar.  SARAH M. KARPANTY, Dept. Ecol. & Evol., SUNY Stony Brook, Stony Brook, NY.

606 Trophic levels and heavy metal concentrations of terns at two California nesting colonies.  MICHAEL H. HORN, Dept. Biol. Sci., California State Univ., Fullerton, CA; ANDREW Z. MASON, Dept. Biol. Sci, California State Univ., Long Beach, CA; DARRYL R. SMITH, Calif. State Univ., Fullerton; ELAINE A. LOGOTHETIS, North Carolina Aquarium at Fort Fisher, Kure Beach, NC; and CHARLES T. COLLINS, Calif. State Univ., Long Beach.

607 Island and Western Scrub-Jays:  extra-pair paternity or genetic monogamy?  KATHLEEN SEMPLE DELANEY, Dept. Organ. Biol., Ecol. & Evol., Univ. California, Los Angeles, CA, MARY JO ELPERS, U.S. Fish & Wildl. Serv., Reno, NV; CHARLES T. COLLINS, Dept. Biol., California State Univ., Long Beach, CA, and ROBERT K. WAYNE, Dept. Organ. Biol., Ecol. & Evol., Univ. California, Los Angeles, CA.

608 The ecology of a subsidized predator:  Common Raven.  WILLIAM I. BOARMAN, U.S. Geol. Surv., Western Ecol. Res. Center, San Diego, CA; WILLIAM B. KRISTAN, III, Center Conserv. Biol., Univ. Calif., Riverside, CA, and WILLIAM C. WEBB, Coll. For. Res., Univ. Washington, Seattle, WA.

609 Area and edge effects on forest songbirds in a nonagricultural landscape of north Mississippi.  STEVEN M. AQUILANI, Dept. Biol., Delaware Co. Coll., Media, PA; J. STEPHEN BREWER and DOUG S. HOHMAN, Dept. Biol., Univ. Mississippi, University, MS.

610 Management of early successional forest to increase diversity of insectivorous Neotropical migrants in Quintana Roo, Mexico.  JAMES A. ROTENBERG, Reserva Ecologica El Eden, Cancun, Quintana Roo, Mexico.

611 Spotlighting - a viable method for surveying grassland owls?  ANNE M. CONDON, BRIAN L. SULLIVAN, ERIC L. KERSHNER, DOUGLASS M. COOPER, Inst. Wildl. Stud., San Diego, CA, and DAVID K. GARCELON, Inst. Wildl. Stud., Arcata, CA.

612 Nest-site characteristics and density of cliff-nesting American Kestrels on San Clemente Island, California.  BRIAN L. SULLIVAN, ANNE M. CONDON, ERIC L. KERSHNER, SEAN P. FINN, DOUGLASS M. COOPER, Inst. Wildl. Stud., San Diego, CA; and DAVID K. GARCELON, Inst. Wildl. Stud., Arcata, CA.

613 A comparison of Red-tailed Hawk and Common Raven nest sites in a small island ecosystem.  BRIAN L. SULLIVAN, ANNE M. CONDON, ERIC L. KERSHNER, SEAN P. FINN, DOUGLASS M. COOPER, Inst. Wildl. Stud., San Diego, CA, and DAVID K. GARCELON, Inst. Wildl. Stud., Arcata, CA.

614 Variation in incubation patterns among three species of grebes nesting at Agassiz NWR, Minnesota.  BRUCE A. EICHHORST, Dept. Biol., Univ. Nebraska-Kearney, Kearney, NE.

615 Nocturnal behaviors of Red-necked Grebes in relation to periods of nest inattentiveness.  BRIAN R. MORITZ and BRUCE A. EICHHORST, Dept. Biol., Univ. Nebraska-Kearney, Kearney, NE.

616 *Names, significance, and use of birds by the Guarani-Izoceño indigenous community of Bolivia.  ANA MARÍA SAAVEDRA ZANKYS, Museo de Historia Natural Noel Kempff Mercado, Santa Cruz, Bolivia.

617 *Genetic variation in the Amethyst-throated Hummingbird complex using mitochondrial DNA.  NANDADEVI CORTES-RODRÍGUEZ, MAGALI HONEY-ESCANDÓN, GABRIELA GARCÍA-DERAS and BLANCA HERNÁNDEZ-BAÑOS, Museo de Zoología "Alfonso L. Herrera", Facultad de Ciencias, UNAM, México D.F.

618 Hummingbird flight kinematics along elevational gradients.  DOUGLAS L. ALTSHULER, Dept. Integ. Biol., Univ. California, Berkeley, CA, PENG CHAI, Lincoln, NE, and ROBERT DUDLEY, Sec. Integ. Biol., Univ. Texas, Austin, TX.

619 Foraging and habitat use by the endangered Laysan Teal:  implications for translocation.  MICHELLE REYNOLDS, USGS Pacific Islands Ecosys. Res. Center, VPI&SU, Hawaii Natl. Park, HI.

620 *Development of an avian biosentinel program for Michigan using the Bald Eagle.  AMY S. ROE, JENNIFER M. WONG, Dept. Env. Tox., Clemson Univ., Pendleton, SC; DAVID A. BEST, U.S. Fish & Wildl. Serv., East Lansing, MI; DENNIS BUSH, Michigan Dept. Env. Quality, Lansing, MI; JAMES G. SIKARSKIE, Coll. Vet. Med., Michigan State Univ., and WILLIAM BOWERMAN, Dept. Env. Tox., Clemson Univ.

621 *Bald Eagle nest placement and reproduction patterns in the northern Lower Peninsula of Michigan.  CARRIE R. STEEN and KELLY F. MILLENBAH, Dept. Fish. & Wildl., Michigan State Univ., East Lansing, MI.

622 *Spatial scale variability in wintering shorebird use of coastal wetland restoration sites.  ANNA R. ARMITAGE and JOY E. YOON, Dept. OBEE, Univ. California, Los Angeles, CA.

623 *Parasite fauna and their effects on condition in a natural population of a tropical passerine.  TERRY R. KRUEGER, Dept. Biol., Univ. Miami, Coral Gables, FL; JULIA V. RODRÍGUEZ and ANNA JIMI ÉNEZ, School Vet. Med., Nat. Univ. Costa Rica, Heredia, Costa Rica.

624 Multiple day constancy as an alternative to pooling in mark-recapture modeling to estimate stopover length.  SARA R. MORRIS, Dept. Biol., Canisius Coll., Buffalo, NY; DAVID A. LIEBNER, Dept. Biol. and Dept. Physics, ERICA M. TURNER, AMANDA M. LARRACUENTE, Dept. Biol., and H. DAVID
SHEETS, Dept. Physics.

625 Conservation of the Mississippi Sandhill Crane.  SCOTT G. HEREFORD, U.S. Fish & Wildl. Serv., Gautier, MS.

626 Optics for the tropics.  JONI ELLIS, Southeast Partners in Flight, Gainesville, FL.

627 Male song repertoire size and female choice in the Gray Catbird.  ERIC T. HAAS, ANDREW S. DOLBY, JENNIFER K. MILLER, CHARLES E. CLARKSON and KATRINA M. STECHLER, Dept. Biol. Sci., Mary Washington Coll., Fredericksburg, VA.

628 Nocturnal thermoregulation in the White-throated Sparrow. KATRINA M. STECHLER, ANDREW S. DOLBY, VANESSA S. DAVIS and JOHN G. TEMPLE, Dept. Biol. Sci., Mary Washington Coll., Fredericksburg, VA.

629 Altering forest management plans to accommodate rare or endangered species -- a positive example and approach.  KELLY J. McKAY, Midwest Biol. Res. & Monitoring Inst., Hampton, IL; JON W. STRAVERS, Midwest Raptor Res. Fund, McGregor, IA; GARY SWENSON, U.S. Army Corps Engin., Rock Island Dist., Pleasant Valley, IA.

630 Avian survey of the Savanna Ordnance Depot bottomlands, an Upper Mississippi River floodplain site.  KELLY J. McKAY, PETER C. PETERSEN and BRIAN L. BLEVINS, Midwest Biol. Res. & Monitoring Inst., Hampton, IL.

631 Using stable isotopes in bird feathers to enhance estimation of transition rates in multi-state capture-recapture models.  LARKIN A. POWELL, School Nat. Res. Sci., Univ. Nebraska, Lincoln, NE.

632 Nocturnal incubation by Wood Ducks during egg laying.  GARY R. HEPP, School For. & Wildl. Sci., Auburn Univ., Auburn, AL.

633 Dynamics of avian and arthropod communities across distinct vegetation zones in the Grand Canyon.  HELEN YARD, Helen Yard Consulting, Flagstaff, AZ, and NEIL COBB, Northern Arizona Univ., Flagstaff, AZ.

634 Does adult prey choice affect reproductive success in Acadian Flycatchers?  LASHALE D. PUGH and COURTENAY N. WILLIS, Dept. Biol., Youngstown State Univ., Youngstown, OH.

635 Dietary dynamics of Barn Owls in a stable environment.  CARL D. MARTI, Raptor Res. Center, Boise State Univ, Boise, ID.

636 Edge effects on bird abundance in a landscape undergoing ponderosa pine forest restoration.  JAMES BATIN and THOMAS D. SISK, Center Environ. Sci. & Edu., Northern Arizona Univ., Flagstaff, AZ.

637 "Forest-grown" yerba mate:  implications for the birds of Paraguay's Atlantic interior forest.  KRISTINA COCKLE and MARTY LEONARD, Biol. Dept., Dalhousie Univ., Halifax, NS.

638 DNA sexing methods in Northern Saw-Whet Owls and Flammulated Owls.  LYNDA LEPPERT, ALFRED DUFTY and SARAH HAMILTON, Biol. Dept., Univ. ID, Boise, ID.

639 Heterophil to lymphocyte ratios in migrating Northern Saw-Whet Owls.  ALFRED M. DUFTY, LYNDA L. LEPPERT, Biol. Dept., Boise St. Univ., Boise, ID, and SARAH L. HAMILTON, Biol. Dept., Univ. ID, Moscow, ID.

640 Molecular phylogenetics of Pyrrhura leucotis parakeets:  species limits and historical biogeography of Neotropical forests.  CAMILA C. RIBAS and CRISTINA Y. MIYAKI, Dept. Biol. Univ. Sao Paulo, Sao Paulo, Brazil.

641 *Suggestions on the choice of territory estimator in resource selection studies, using data on Cerulean Warblers.  JENNIFER J. BARG and RALEIGH J. ROBERTSON, Dept. Biol., Queen's Univ, Kingston, ON.

642 Characteristics of Cerulean Warbler territories in southern Indiana.  KAMAL ISLAM and CYNTHIA BASILE, Dept. Biol., Ball State Univ., Muncie, IN.

643 *Cerulean Warbler relative abundance and frequency of occurrence relative to large-scale edge. SCOTT B. BOSWORTH, Div. For., West Virginia Univ., Morgantown, WV; PETRA BOHALL WOOD, West Virginia Coop. Fish & Wildl. Res. Unit, West Virginia Univ., and RANDY DETTMERS, Div. Migratory Birds, US Fish & Wildl. Serv., Hadley, MA.

644 Effectiveness of Florida Burrowing Owl conservation measures.  KATHERIN L. HALEY, BRIAN A. MILLSAP, CINDY BEAR and ELIZABETH K. McCONNELL, Florida Fish & Wildl. Conserv. Comm., Tallahassee, FL.

645 *The impacts of land cover changes of reproductive habitats of Resplendent Quetzal on its distribution in southern Mexico.  SOFÍA SOLÓRZANO, Instituto de Ecología, Campus Morelia, UNAM. Michoacán, Mexico; MIGUEL ANGEL CASTILLO-SANTIAGO, DARIO NAVARRETE-GUTI ÉRREZ, ECOSUR, San Cristóbal de las Casas, Chiapas, Mexico, and KEN OYAMA, Instituto de Ecología, Campus Morelia, UNAM, Michoacán, Mexico.

646 Building nesting and roosting towers for Chimney Swifts.  PAUL D. KYLE and GEORGEAN Z. KYLE, Driftwood Wildl. Assoc., Austin, TX.

647 Barred Owl nesting ecology in suburban and rural habitats.  ERIC S. HARROLD and RICHARD O. BIERREGAARD, Dept. Biol., Univ. North Carolina, Charlotte, NC.

648 Band recovery data from fledgling Brown Pelicans on the Chandeleur Islands, Louisiana.  JAMES O. HARRIS, NANCY F. WALTERS and CHARLOTTE D. PARKER, Southeast Louisiana Refuges, U.S. Fish & Wildl. Serv., Slidell, LA.

649 Succession, herbivory and the ecology of fear:  implications for nest predation at the landscape level in the boreal forest.  KEITH P. LEWIS, Biopsychol. Programme, Memorial Univ. Newfoundland, St. John's, NF.

650 *Austral migration:  current state of knowledge and research needs, with preliminary data from a monitoring station in the Bolivian Chaco.  ALEX E. JAHN, Dept. Zool., Univ. Florida, Gainesville, FL; SUSAN E. DAVIS and ANA MARIA SAAVEDRA, Museo de Historia Natural Noel Kempff Mercado, Santa Cruz, Bolivia.

651 Conservation of the threatened seabird community of the Juan Fernandez Islands, Chile.  PETER J. HODUM, Dept. Biol. Sci., California State Univ.- Long Beach, Long Beach, CA; MICHELLE D. WAINSTEIN, Dept. Aquatic & Fish. Sci., Univ. Washington, Seattle, WA; and ERIN HAGEN, Univ. Washington.

652 The effect of winter food supplementation on the reproductive behavior of the Northern Cardinal.  THERESA L. RAFIQ, Univ. Pennsylvania, Philadelphia, PA; TIANA GUINARD and PETER MARRA, Smithsonian Environ. Res. Center, Edgewater, MD.

653 Call variation in island endemic subspecies of the Brown-throated Parakeet.  JESSICA R. EBERHARD, Cornell Lab. Ornithol., Ithaca, NY.

654 Isolation of a new Mycoplasma species from the tissues of Oriental White-backed Vulture in Pakistan and possible role in population collapse.  J. LINDSAY OAKS, SHANNON L. DONAHOE, Dept. Vet. Microbiol. & Path., Washington State Univ., Pullman, WA; MARTIN GILBERT, MUNIR Z. VIRANI, RICK WATSON, The Peregrine Fund, Boise, ID, and ALEEM AHMED KHAN, Ornithol. Soc. Pakistan, Dera Ghazi Khan, Pakistan.

655 Long-term trends of the breeding birds on Hog Island.  JENNIFER E. JOHNSON, Dept. Biol., Swarthmore Coll., Swarthmore, PA, and SCOTT WEIDENSAUL, Schuylkill Haven, PA.

656 California Condor reintroduction:  status and direction of the Arizona project.  ANDI S. ROGERS, Arizona Game & Fish Dept., Flagstaff, AZ; and CHRIS N. PARISH, The Peregrine Fund, Boise, ID.

657 The avian hematocrit:  what can it tell us about wild birds?  JEANNE M. FAIR and SHAYNA WHITAKER, Los Alamos Natl. Lab., Environ. Dynamics & Spatial Analysis, Los Alamos, NM.

658 Avian reproductive success in restored grasslands:  measuring the success of a restoration effort.  JOHN B. DUNNING, Jr., BRYAN WEE and ALEXANDRA HOUSTON, Dept. For. & Nat. Res., Purdue Univ., West Lafayette, IN.

659 Landscape changes and bird movements in the central Amazon.  CHERYL M. STRONG, Biol. Dynamics For. Frag. Project, Manaus, Brazil, and PHIL STOUFFER, Southeastern Louisiana Univ., Hammond, LA.

660 Dawn song as a sexual signal in the Acadian Flycatcher.  BONNIE E. WOOLFENDEN, BRIDGET J. M. STUTCHBURY, Dept. Biol., York Univ., Toronto, ON, and EUGENE, S. MORTON, Smithsonian Inst., Front Royal, VA.

661 Habitat selection of a declining warbler population:  the Canada Warbler in northern Vermont.  JAMESON CHACE, JAMES GILLIS, Biol. Dept., Villanova Univ., Villanova, PA, and STEVEN FACCIO, Cons. Biol. Dept., Vermont Inst. Nat. Sci., Woodstock.

662 Use of native and exotic plants by nesting Yellow-billed Cuckoos:  a tale of two rivers.  HIRA A. WALKER, Dept. Biol., Univ. New Mexico, Albuquerque, NM, SCOTT H. STOLESON, DEBORAH M. FINCH, JEFF KELLY, USDA For. Serv., Rocky Mountain Res. Sta., Albuquerque, NM.

663 A preliminary analysis of the geographic distribution and habitat use of the Black-capped Vireo on the winter range in western Mexico.  R. A. POWELL, R. D. SLACK, Dept. Wildl. & Fish. Sci., Texas A & M Univ., College Station, TX; and C. FARQUHAR, Wildl. Divers. Prog., Texas Parks & Wildl. Dept., Austin, TX.
14664 Do we need corridors to enhance bird movement between forest fragments?  MIGUEL ÂNGELO MARINI, Dept. Zoologia, Univ. Brasília, Brasília, DF, Brazil; RÔMULO RIBON and RENATA D. ANDRADE, Ecol. Cons. Man. Vida Silv., Univ. Fed. Minas Gerais, Belo Horizonte, MG, Brazil.

665 A comparison of historic and current distribution of spruce grouse in the Adirondack Mountains.  GLENN JOHNSON, ANGELENA  ROSS, AMY HOLLISTER, Dept. Biol., SUNY Potsdam, Potsdam, NY; and JOHN OZARD, New York State Dept. Environ. Conserv., Albany, NY.

666 Estrogen may play an immuno-protective role in female House Finches exposed to Mycoplasma gallisepticum.  KRISTY L. FARMER, PAUL M. NOLAN, GEOFFREY E. HILL and SHARON R. ROBERTS, Dept. Biol. Sci., Auburn Univ., Auburn, AL.

667 Diet breadth and altitudinal migration in Costa Rican frugivorous birds.  ALICE BOYLE, Dept. Ecol. & Evol. Biol., Univ. Arizona, Tucson, AZ.

668 Diets of Lesser Scaup during spring migration:  has there been a decline in preferred forage in the Mississippi Flyway?  MICHAEL J. ANTEAU and ALAN D. AFTON, USGS Louisiana Coop. Fish & Wildl. Unit, Louisiana State Univ., Baton Rouge, LA.

669 Sandgrouse shooting in the Northern Cape Province, South Africa.  MARK D. ANDERSON, Dept. Agric., Land Reform, Env. & Cons., Kimberley, South Africa.

670 The coastal plain of Chiapas:  a migratory pathway with opportunities for conservation stopover habitat for migratory raptor.  EFRAIN CASTILLEJOS-CASTELLANOS, Pronatura Chiapas, San Cristóbal de Las Casas Chiapas, México.

671 *Influence of weather conditions and migrant density on migration patterns of Northern Saw-whet Owls.  DAVID M. WHALEN, Dept. Biol., Univ. New Mexico, Albuquerque, NM; and BRYAN D. WATTS, Center Cons. Biol., Coll, William & Mary, Williamsburg, VA.

672 Weather, reproductive success, and population dynamics in a Song Sparrow population over 21 years.  MARY K. CHASE, NADAV NUR and GEOFFREY R. GEUPEL, Point Reyes Bird Observ., Stinson Beach, CA.

673 Feeding ecology of insectivorous birds in Brazilian Atlantic forest.  RENATA DURÃES, Dept. Biol., Univ. Missouri-St. Louis, Saint Louis, MO, and MIGUEL ÂNGELO MARINI, Univ. Brasília, DF, Brazil.

674 Mortality and population collapse of Oriental White-backed Vulture in Pakistan.  MUNIR Z VIRANI, MARTIN GILBERT, RICK WATSON, The Peregrine Fund, Boise, ID; ALEEM A. KHAN, BZ Univ., Multan, Punjab, Pakistan; LINDSAY OAKS, Dept. Vet. Microbiol. & Path., Washington State Univ., Pullman, WA; JAMSHED CHAUDHRY, SHAKEEL AHMED, MUHAMMAD ARSHAD, SHAHID MAHMOOD and AHMAD ALI, BZ Univ.

675 Fall waterfowl migrations captured by radar along the Illinois River.  ANDREA M. CAMPERO, ROBERT H. DIEHL, Dept. Animal Biol., Univ. Illinois Urbana-Champaign, Champaign, IL, and RONALD P. LARKIN, Illinois Nat. Hist. Surv., Champaign, IL.

676 Winter bird use of the invasive Chinese tallow trees in Louisiana.  MICHAEL J. BALDWIN, WYLIE C. BARROW, Jr., CLINT JESKE, USGS, Natl. Wetlands Res. Center, Lafayette, LA, and VERNON WRIGHT, School Renew. Nat. Res., Louisiana State Univ., Baton Rouge, LA.

677 Distribution, abundance, and breeding biology of White Terns on Oahu, Hawaii.  ERIC A. VANDERWERF, U.S. Fish & Wildl. Serv., Honolulu, HI.

678 Species and sex differences in egg-pecking behavior between parasitic and non-parasitic cowbirds. PAULO E. LLAMBÍAS, VALENTINA FERRETTI and JUAN REBOREDA, Biol. Sci., Univ. Buenos Aires, Buenos Aires, Argentina.

679 Reproductive output, nestling growth and diet of Lilac-crowned Parrots in tropical dry forest. ALEJANDRO SALINAS-0MELGOZA, KATHERINE RENTON and TANIA SANCHEZ. Inst. Biol., UNAM, Mexico.

680 Pre-fledging growth rates of Common Nighthawks.  BRETT K. SANDERCOCK, Div. Biol., Kansas State Univ., Manhattan, KS.

681 A preliminary look at the use of remote cameras to assess diet of nesting Ferruginous Pygmy-Owls in southern Arizona.  SHAWN F. LOWERY, SARAH J. LANTZ and MICHAEL F. INGRALDI, Research Branch, Arizona Game & Fish Dept., Phoenix, AZ.

682 Recent divergence between Baltimore and Black-backed orioles: did the Baltimore Oriole evolve from a Mexican ancestor?  BEATRICE KONDO and KEVIN E. OMLAND, Dept.  Biol. Sci., Univ. Maryland, Baltimore Co., Baltimore, MD.

683 The adrenocortical response to handling stress in breeding Adélie Penguins:  effects of breeding stage, body mass and intensity of human visitation.  CAROL M. VLECK, Prog. Ecol. & Evol. Biol., Iowa State Univ., Ames IA; and THERESA L. BUCHER, Dept. Biol., Univ. California, Los Angeles, CA.

684 Effects of silvicultural intensity on Pileated Woodpecker presence and foraging patterns.  JÉRÔME LEMAÎTRE and MARC-ANDRÉ VILLARD, Chaire de recherche du Canada en conservation des paysages and Département de biologie, Université de Moncton, Moncton, NB.

685 Reintroduction of Brown-headed Nuthatches and Eastern Bluebirds to Everglades National Park: methodology and factors associated with success.  GARY L. SLATER, Ecostudies Inst., Mount Vernon, WA; KENNETH D. MEYER, ARC Inst., Inc., Gainesville, FL, and SKIP SNOW, Everglades Natl. Park, Homestead, FL.

686 Agricultural vs. natural habitat use by wintering raptors in south Florida.  ELISE VERNON PEARLSTINE, FRANK J. MAZZOTTI and CHRIS J. DEREN, Everglades Res. & Edu. Center, Univ. Florida, Belle Glade, FL.

687 Winter observations of Great Lakes' Piping Plovers 1995 - 2001:  conservation and management implications.  JENNIFER H. STUCKER, FRANCESCA J. CUTHBERT, Dept. Fish. Wildl. and Conserv. Biol., Univ. Minnesota, St. Paul, MN, LAUREN C. WEMMER, Conserv. Biol. Prog., Univ. Minnesota, and BRAD WINN, Georgia Dept. Nat. Res., Brunswick, GA.

688 The return of Yellow-shouldered Blackbirds to natural nesting substrates.  WILLIAM V. DELUCA, Smithsonian Environ. Res. Center, Edgewater, MD, DEREK HENGSTENBERG, Dept. Wildl. & Fish., Mississippi State Univ., Mississippi State, MS, and LEONARD REITSMA, Dept. Nat. Sci., Plymouth State Coll., Plymouth, NH.

689 Observations of song modes in the American Redstart:  is a reevaluation of function necessary?  RACHEL T. BRU, ROBERT J. SMITH and FRANK R. MOORE, Dept. Biol. Sci., Univ. Southern Mississippi, Hattiesburg, MS.

690 Demography of the endangered Ferruginous Pygmy-Owl of southern Arizona.  MICHAEL F. INGRALDI, DENNIS J. ABBATE and RENEE L. WILCOX, Research Branch, Arizona Game & Fish Dept., Phoenix, AZ.

691 Age-related reproductive success of the Laysan Albatross.  FRANS JUOLA, Dept. Biol. & Progr. Anim. Behav., Bucknell Univ., Lewisburg, PA; ANGELA D. ANDERS, Progr. Ecol., Pennsylvania State Univ., State College, PA; and DONALD C. DEARBORN, Dept. Biol. & Progr. Anim. Behav., Bucknell Univ.

692 Demography of Acadian Flycatchers in the Blue Ridge Mountains of Virginia.  PETER T. FAUTH, Dept. Biol., Hartwick Coll., Oneonta, NY, and PAUL R. CABE, Biol. Dept., Washington & Lee Univ., Lexington, VA.

693 Population genetics of the Brewer’s Sparrow.  EMILY K. CROTEAU, STEPHEN C. LOUGHEED, Dept. Biol., Queen's Univ., Kingston, ON; J. DAVILA, Instituto de Investigacion en Recursos Cinegeticos (IREC), Ciudad Real, Spain; P. KRANNITZ, Canadian Wildl. Serv., Delta, BC, N. MAHONY, Centre App. Conserv. Biol., Univ. British Colombia, Vancouver, BC, and PETER T. BOAG, Dept. Biol., Queen's Univ.

694 Deciphering the tempo of biotic diversification:  biogeographic patterns and the historical assembly of the South American avifauna.  ANA LUZ PORZECANSKI and JOEL CRACRAFT, Am. Mus. Nat. Hist., New York, NY, and Dept. Ecol. Evol. & Env. Biol., Columbia Univ., New York, NY.

695 Missing on Maui and waning on Oahu:  phylogeography of the Elepaio.  SARAH L. BURGESS, Prog. EEC Biol., Univ. Hawaii, Honolulu, HI.

696 Sex ratios of nestling House Wrens vary with brood order.  E. DALE KENNEDY, KAMI MARSACK, NATHANIEL A. SOWA and DOUGLAS W. WHITE, Biol. Dept., Albion Coll, Albion, MI.

697 Comparison of predation rates and predators between real and artificial Swainson's Thrush nests.  REBECCA PIERCE RALL and T. LUKE GEORGE, Dept. Wildl., Humboldt State Univ., Arcata, CA.

698 Variation in mass and energetic condition of Neotropical migrants during stopover at farmstead woodlot sites in southeastern South Dakota.  H. A. CARLISLE, E. T. LIKNES and D. L. SWANSON, Dept. Biol., Univ. South Dakota, Vermillion, SD.

699 Influence of community succession on brood parasitism and nest depredation in the Black-capped Vireo.  C. CRAIG FARQUHAR, Texas Parks & Wildl. Dept., Austin, TX; ERIC KELCHLIN, Columbia Natl. Wildl. Refuge, Othelo, WA, AMY PORTER, Bellevue, WA and CASEY RICHART, Centralia, WA.

700 Atlas of breeding birds in Cuba.  BÁRBARA SÁNCHEZ, ARTURO HERNÁNDEZ, PEDRO BLANCO, Instituto de Ecología y Sistemática, CITMA, La Habana, Cuba; JAMES WILEY, USGS, Maryland Coop. Fish & Wildl. Res. Unit, Princess Anne, MD; FRANCISCO CEJAS, ADELA HERRERA and LÁZARO RODRÍGUEZ, Instituto de Ecología y Sistemática.

701 Conservation status of Townsend's Shearwater. JUAN E. MARTÍNEZ-GÓMEZ, Dept. Biol., Univ. Missouri, Saint Louis MO, and JEFF K. JACOBSEN, Humboldt State Univ., Arcata CA.

702 *Stable isotope tracking - in search of "Canadian" Burrowing Owls in Mexico and Texas.  J. M. DUXBURY, Dept. Renew. Res., Univ. Alberta, Edmonton, AB; G. L. HOLROYD, Canadian Wildl. Serv., Environment Canada, Edmonton, AB, and K. MUEHLENBACHS, Dept. Earth & Atmospheric Sci., Univ. Alberta, Edmonton, AB.

703 *Mate attraction and paternal care in the House Wren.  NATALIE S. DUBOIS, Dept. Zool. and W. K. Kellogg Biol. Sta., Michigan State Univ., Hickory Corners, MI; E. DALE KENNEDY, Biol. Dept., Albion Coll., Albion, MI; and THOMAS GETTY, Dept. Zool. and W. K. Kellogg Biol. Sta., Michigan State Univ., Hickory Corners, MI.

704 The evolution of plumage dichromatism in dabbling ducks:  rejection of the widely accepted scenario. MICHAEL D. SORENSON, RYAN H. HARRIGAN, Dept. Biol., Boston Univ., Boston, MA; and KEVIN P. JOHNSON, Illinois Nat. Hist. Surv., Champaign, IL.

705 Factors influencing ptarmigan population cycles in Newfoundland.  ELLEN JEDREY, W. A. MONTEVECCHI, Biopsychol. Prog., Memorial Univ. Newfoundland, St. John’s, NF, S. MAHONEY, M. McGRATH, Sci. Div., Dept. Tour., Rec. & Culture, St. John’s, NF, G. LEONARD and A. MURLEY, Dept. Forestry & Agrifoods, Pasadena, NF.

706 Retention of host defenses in the absence of avian brood parasitism.  BRIAN D. PEER, STEPHEN I. ROTHSTEIN, and MICHAEL J. KUEHN, Dept. Ecol., Evol. & Marine Biol., Univ. California, Santa Barbara, CA.

707 Wild birds and fenthion:  a deadly mix.  PATRICIA R. BRIGHT, MICHAEL J. PARR and GAVIN SHIRE, American Bird Conservancy, Washington, DC.

708 Composition and habitat associations of bird communities in urban parks.  JOAN L. MORRISON, JESSICA A. BIRNBAUM, PAULA M. CIASTKO and CHRISTOPHER M. GEREMIA, Dept. Biol., Trinity Coll., Hartford, CT.

709 *Detecting threshold ranges in the effects of silvicultural intensity on presence and reproductive activity of mature forest songbirds.  JEAN-SÉBASTIEN GUÉNETTE and MARC-ANDRÉ VILLARD, Chaire de recherche du Canada en conservation des paysages and Département de biologie, Université de Moncton, Moncton, NB.

710 vacant

711 Nest attentiveness patterns in Wood Thrushes.  KIM C. DERRICKSON, Dept. Biol., Loyola Coll., Baltimore, MD.

712 vacant

713 Sex ratio bias at hatching in the Roseate Tern differs between colonies.  PATRICIA SZCZYS and RICHARD KESSELI Dept. Biol., Univ. Mass.-Boston, Boston, MA.

714 Associations of instream flow alterations and land use impacts with bird community structure in a southwestern riparian community.  ELISABETH M. AMMON, Dept. Biol., Univ. Nevada, Reno, NV, and DAMIAN FAGAN, The Nature Conservancy's Moab Proj. Office, Moab, UT.

715 Reproductive success of riparian songbirds in southern Oregon:  potential source and sink habitats.  JEANNIE M. HELTZEL, Hart Mountain Natl. Antelope Refuge, Plush, OR, and SUSAN L. EARNST, USGS Snake River Field Sta., Boise, ID.

716 Effects of Hurricane Georges on the composition, abundance, and survival of winter residents in the Guanica Forest of southwest Puerto Rico.  JOHN FAABORG, Div. Biol. Sci., Univ. Missouri, Columbia, MO; KATIE DUGGER, Dept. Wildl. Biol, Oregon State Univ., Corvallis, OR; and WAYNE J. ARENDT, USDA For. Serv., IITF/Sabana Field Res. Sta., Palmer, PR.

717 Species or host races?  direct estimate of hybridization in sympatric indigobirds.  CHRISTOPHER N. BALAKRISHNAN, KRISTINA M. SEFC and MICHAEL D. SORENSON, Dept. Biol., Boston Univ., Boston, MA.

718 *The influence of prey choice and food quality on reproductive performance in an Arctic Tern population.  CHRISTINA J. MARANTO, Dept. Ecol. & Evol. Biol., Univ. California, Irvine, CA.

719 Influence of the flora and vegetative structure on populations of terrestrial birds on Cayo Coco, Cuba.  DAYSI RODRÍGUEZ, ALFREDO GUTIERREZ and BÁRBARA SÁNCHEZ, Instituto de Ecología y Sistemática, CITMA, La Habana, Cuba.

720 The effect of avian malaria on the breeding success of Hawaii Amakihi (Hemignathus virens).  A. MARM KILPATRICK, Dept. Biol., Univ. Wisconsin, Madison, WI., DENNIS LaPOINTE, CARTER T. ATKINSON and JULIE K. LEASE, USGS-BRD Pacific Island Ecosys, Res, Center, Hawaii Natl. Park, HI.

721 Investigating the cause of AVM in Bald Eagles and waterfowl.  ANNA H. BIRRENKOTT, Dept. Environ. Tox., Clemson Univ., Pendleton, SC; JOHN J. HAINS, USACE, Calhoun Falls, SC; SUSAN B. WILDE, Baruch Inst., Univ. South Carolina, Charleston, SC; JOHN R. FISCHER, Southeastern Coop. Wildl. Dis. Study, Univ. Georgia, Athens, GA; THOMAS M. MURPHY, Wildl. Div., South Carolina Dept. Nat. Res., Green Pond, SC; and WILLIAM W. BOWERMAN, Clemson Univ.

722 Conservation strategies for three populations of Burrowing Owls in New Mexico.  CAROL A. FINLEY, Hawks Aloft, Albuquerque, NM; M. HILDEGARD REISER, 49th CES/CEV, Holloman AFB, NM; PATRICIA C. ARROWOOD, Dept. Fish. & Wildl., New Mexico State Univ., Las Cruces, NM; BOBBY DOW, 377 SPTG/CEVQ, Kirtland AFB, NM; and KRISTINE JOHNSON, Biol. Dept, Univ. New Mexico, Albuquerque, NM.

723 vacant

724 Fatty acid composition of depot fat in Arctic-nesting shorebirds during spring migration.  DAVID A. RINTOUL, Biol. Div., Kansas State Univ., Manhattan KS, and JAMES RIVERS, Kansas Coop. Fish & Wildl. Res. Unit, Biology Div., Kansas State Univ.

725 *Importance of habitat characteristics at multiple scales on the nest success of the Prothonotary Warbler.  JILL GANNON and ROBERT J. COOPER, Warnell School For. Res., Univ.Georgia, Athens, GA.

726 Vacant.

727 Do aspen stands influence productivity of ponderosa pine forest birds

 JILL D. CLIFTON and PAUL BEIER, For. Dept., Northern Arizona Univ., Flagstaff, AZ.

728 The habitat concept in ornithology revisited.  MATTHEW D. JOHNSON, Dept. Wildl., Humboldt State Univ., Arcata, CA.

729 A comparison of nocturnal call counts of migrating birds and reflectivity measurements on Doppler radar (WSR-88D).  ANDREW FARNSWORTH, Nat. Audubon Soc., New York, NY; SIDNEY A. GAUTHREAUX, Dept. Biol. Sci., Clemson Univ., Clemson, SC; and DONALD VAN BLARICOM, Strom Thurmond Inst., Clemson Univ., Clemson, SC.

730 Guidelines to prevent violation of the Migratory Bird Treaty Act.  THOMAS P. RYAN, JOANNA CEZNIAK, ROBIN E. DAKIN, DAVID L. PLUMPTON and SCOTT B. TERRILL, H. T. Harvey & Associates., San Jose, CA.

731 Behavioral support for genetic benefits of extra-pair copulations by female Waved Albatrosses.  KATHRYN P. HUYVAERT and PATRICIA G. PARKER, Dept. Biol., Univ. Missouri-St. Louis, St. Louis, MO.

732 Fifty-year changes in breeding bird populations on the Allegheny Plateau.  CHANDLER S. ROBBINS and BARBARA A. DOWELL, USGS Patuxent Wildl. Res. Center, Laurel, MD.

733 Abundance and diversity of birds over an elevational gradient in the Sierra Nevada.  KATHRYN L. PURCELL and DOUGLAS A. DRYNAN, USDA For. Serv., Pacific Southwest Res. Sta., Sierra Nevada Res. Center, Fresno, CA.

734 Estimating population size and setting conservation targets for North American land birds.  KENNETH V. ROSENBERG, Cornell Lab. Ornithol., Ithaca, NY, PETER J. BLANCHER, Bird Studies Canada, Ottawa, ON, and JEFFREY V. WELLS, Natl. Audubon Soc.

735 Habitat and nesting success in mixed-grass prairie:  does it really matter where you put your basket?  J. SCOTT DIENI, Redstart Consulting, Evergreen, CO, STEPHANIE L. JONES, USFWS, Nongame Migratory Bird Program, Denver, CO, and PAULA GOUSE, US Fish & Wildl. Serv., Bowdoin Natl. Wildl. Refuge, Malta, MT.

736 Models for evaluating Peregrine Falcon breeding habitat in West Greenland.  C. WIGHTMAN, Raptor Res. Center, Boise State Univ., Boise, ID, and M. FULLER, US Geol. Surv., Boise, ID.

737 Trophic cascades and bird communities:  how the loss of grizzly bears and wolves can affect the diversity of riparian birds.  PETER B. STACEY, Dept. Biol., Univ. New Mexico, Albuquerque, NM; and JOEL BERGER, Wildl. Conserv. Soc., Teton Field Office, Moose WY.

738 Habitat use of the Three-toed Woodpecker during the breeding period.  PETER PECHACEK and WERNER d OLEIRE-OLTMANNS, Nationalparkverwaltung, Berchtesgaden, Germany.

739 Molecular systematics of the genus Accipiter:  a preliminary analysis.  JOSHUA M. HULL, Dept. Biol., Sonoma State Univ., Rohnert Park, CA, and Golden Gate Raptor Observatory, Sausalito, CA, and DEREK GIRMAN, Dept. Biol., Sonoma State Univ.

740 Studies on West Nile Virus in migratory birds at Eilat, Israel.  REUVEN YOSEF, Internatl. Birding & Res. Centre in Eilat, Eilat, Israel, MERTYN MALKINSON, Kimron Vet. Inst., Bet Dagan, Israel, and RONI KING, Nature Reserves & Parks Authority, Jerusalem, Israel.

741 Use of counts and banding in detecting changes in songbird population during migration.  SCOTT SOMERSHOE, USGS-Patuxent Wildl. Res. Center, Vicksburg, MS, and C. RAY CHANDLER, Dept. Biol., Georgia Southern Univ., Statesboro, GA.

742 Habitat use by Swainson's Warblers in a managed bottomland forest.  SCOTT SOMERSHOE, USGS-Patuxent Wildl. Res. Center, Vicksburg, MS; STEVEN HUDMAN, Dept. Biol., Univ. Vermont, Burlington, VT, and C. RAY CHANDLER, Dept. Biol., Georgia Southern Univ., Statesboro, GA.

743 Lead effects on neurobehavioral development in gulls.  JOANNA BURGER, Div. Life Sci., Rutgers Univ., Piscataway, NJ, and MICHAEL GOCHFELD, Environ. & Community Medicine, UMDNJ-Robert Wood Johnson Med. School, Piscataway, NJ.

744 The European Endangered Species Programme for the Indian White-backed Vulture Gyps bengalensis: current status and future potential.  CAMPBELL MURN, The Hawk Conservancy Trust, Andover, Hampshire, England.

745 Influence of age and dispersal on reproductive success in Cliff Swallows.  KARL L. KOSCIUCH, KEITH A. ARNOLD, TRACEY N. JOHNSON and PATRICIA J. SIKES, Dept. Wildl. & Fish. Sci., Texas A&M Univ., College Station, TX.

746 Piping Plover biology and conservation at Lake Diefenbaker, Saskatchewan.  J. PAUL GOOSSEN and SHARILYN M. WESTWORTH, Canadian Wildl. Serv., Edmonton, AB.

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