Who We Are

Photograph by: Catalina Mora

Where We Work -The Osa Peninsula

Photograph by: Alan Dahl


Photograph by: Manuel Sanchez

World Migratory Bird Festival

Photograph by: Minor Hidalgo


Conserving Birds And Their Habitats On The Osa Peninsula Through Research And Education

Who We Are

Osa Birds is a charitable non-profit organization dedicated to conserving birds and their habitats on the Osa Peninsula and the southern Pacific coastal slope of Costa Rica through innovative science, education, conservation initiatives and key partnerships that will facilitate species protection.


Osa Birds monitors bird population tendencies to detect possible species declines over time.  We collaborate with public agencies,  non-governmental organizations working to achieve similar objectives, and interested parties to develop conservation management strategies for species protection over the long term.

Education and Outreach

Osa Birds works with to awareness of bird conservation and habitat protection within the local rural schools and communities in which Osa Birds operates.  Educational and outreach activities include…

Osa Birds Gallery


News and Updates

Featured Bird: Golden-winged Warbler

The Golden-winged Warbler (Vermivora chrysoptera) is a North American Neotropical migratory bird in the family Parulidae that breeds primarily in the United States and overwinters on the Osa Peninsula from approximately October through April.  It is a priority bird...

Featured Bird: Black-cheeked Ant-Tanager

This months highlighted bird is very special in two ways because not only is it the bird that launches Osa Birds organizational website, but because it is also the only bird species endemic to the Osa Peninsula.  No other bird carries with it this auspicious...

Welcome Neotrops

NEOTROPICAL MIGRANTS ARRIVE! The Costa Rican rainy season marks the time of year when a large majority of Neotropical migratory birds arrive to the Osa.  Some birds arrive as early as August such as the Yellow Warbler (Setophaga petechia), and the Black-and-white...