The loss of these birds will lead to the unraveling or to the complete collapse of entire ecosystems. An adult male yellow-bellied sunbird-asity (Neodrepanis hypoxantha) in Ranomafana National Park, ...

Imagine zooming out on a giant family tree that includes every bird you have ever seen. Ostriches sprint across open plains, hummingbirds hover at flowers, penguins slice through cold seas, and eagles ...

A magnolia warbler (left) and an American redstart (right). During their migrations, these species may travel together. Credit: Shutterstock This season, billions of birds will take to the skies as ...

Forget the canary in a coal mine: today the danger zone is the entire U.S., and the sentinel species comprise a growing list that includes the Golden-cheeked Warbler, the Florida Scrub Jay and the ...