2007 | Publisher: USGS | Format: .PDF
pubs.usgs.gov — Ospreys are large fish-eating birds of prey that live along seacoasts, lakes, and rivers. Three times since 1977, USGS zoologist Chuck Henny has led an international team to survey ospreys and other water birds that nest in northwestern Mexico. This USGS report details the long-term dataset and estimates on regional population trends.