Santa Rosa National Park is a seasonally dry forest.   This means that the park experiences a pronounced dry season where there is

little rainfall, many of the plants lose their foliage, and many of the streams dry up.  This extreme seasonality has a strong influence on

how primates distribute themselves throughout the site during the dry season.  The dry season runs from mid-December through mid-

May and during this period there is virtually no rainfall; annual rainfall is between 800-2600mm (mean 1473 mm).  Mean high

temperatures range from 21.6 C (70.0 F) in September to 34.4 C (93.9 F) in April.

     Below are a series of pictures taken at the same locations during the wet and dry seasons to illustrate how drastic the changes in the

forest are between seasons.  The pictures on the left are from the dry season and those on the right are from the wet season.