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Our Conservation

The Osa Peninsula.

The Osa Peninsula is on the far south Pacific tip of Costa Rica, in one of the most biodiverse areas on the planet. It is home to Corcovado National Park, that encompasses a wide variety of distinct ecosystems including old growth primary rainforest, palm forests, mangrove swamps, and coastal and marine habitats. With this variety of ecosystems comes a large number of native, 

endemic and migratory species. The Osa Peninsula alone holds an estimated 2.5% of global biodiversity, with some 250,000 plant and animal species, over 300 of which are found nowhere else on the planet.  

One side of the peninsula faces the Pacific ocean, with powerful waves and strong currents on wild pristine beaches that have been largely saved from coastal development. The other side creates the Golfo Dulce (sweet gulf), the only tropical fjord found on the American continent and an ecosystem with incredibly unique oceanographic characteristics. The gulf is an "inner sea" that sits between the Osa Peninsula and Piedras Blancas National Park on the mainland, and acts as a critical site for feeding and reproduction in numerous keystone species including humpback whales and sea turtles.

The beaches in our conservation area face the Pacific ocean, and are some of the busiest sea turtle nesting beaches on the south Pacific coast of Cosa Rica with over 7000 nests being laid annually from the Olive Ridley and Pacific green species.



Golfo Dulce


Rio Oro Refuge.


We focus the majority of our efforts on the Rio Oro state refuge that includes nearly 8km of nesting beach habitat and a marine area. The map below shows the area of the area of coastline that makes up the refuge, as well as a number of other mixed and state refuges that together protect a large area of the coast and forest betwen Rio Oro and Corcovado National Park.

Rio Oro refuge.png

All of our research and volunteer activities are conducted under permits from SINAC-ACOSA and CONAGEBIO.

Permiso No: SINAC-ACOSA-D-PI-R-058-2022 

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