A once-thriving bird haven is losing visitors, and experts are concerned it could be a serious issue.  What's happening? A popular stop for millions of birds migrating from Siberia is ...

A new study from Yale University that tracked the movements of 406 species of North American birds revealed a troubling pattern: Even the fastest birds can't outfly the dangers of the warming planet.

Biologists are using the devices to better understand the bird's behavior and, ultimately, what might be driving our most ...