is found on the Pacific side of the Osa Penninsula,
in the Province of Puntarenas. Founded in 1975 this
park has a land area of 54,538.9 hectares and a maritime
area of 2,400 hectares.
This park is located in what is refered to as the
very wet tropical forest of the Pacific side of Costa
Rica. As such it contains extraordinary botanical
and zoological resources. It is considered an excellent
laboratory for the study of the inter-relationships
of the inhabitants of tropical ecosystems and the
structure and functioning of said systems. In effect,
this is the last great piece of undisturbed forest
of this type left on the Pacific side of the Americas.
are some 500 species of forest trees in the park,
about a quarter part of all the tree species found
in Costa Rica. The following habitants are found:
montane forest, cloud forest, plains forest, swamp
forest, palm swamp forest (yolillal), herbaceous swamp,
mangrove forest, river & canal vegetation and beach
In the park there are over 100 species of mammals,
370 species of birds, 115 reptiles including anphibians
and about 40 species of fresh water fish.