Project overview: Study Yosemite’s migratory and resident birds to guide habitat-restoration projects, track population trends in relation to climate change, train young biologists, and engage visitors in wildlife conservation.  

How your support helps: According to a study released in 2019, nearly 3 billion birds have vanished from the U.S. and Canada since 1970, with astounding losses among common species, such as warblers, finches, and sparrows.  

Through the park’s MAPS (Monitoring Avian Productivity & Survivorship) program, which Conservancy donors have supported since 2008, experienced biologists work with early-career scientists and interns to collect data on birds throughout the park. The program has made significant scientific contributions to help protect birds and engage park visitors through hands-on activities. The longevity of this project informs park management restoration decisions, assesses the effects of climate change on local species, and provides outreach opportunities for visitors to learn more about songbird conservation. 

This year: In 2025, park biologists will perform essential monitoring and research work to collect data on 2,000+ songbirds and lead interpretive field trips for visitors in Yosemite National Park. 

Project partners: Yosemite National Park, California Department of Fish and Wildlife, and The Institute for Bird Populations