By Spoorthy Raman A recent report assessing the health of U.S. bird populations presents a grim outlook: Birds in the U.S.

The eastern bluebird is a species familiar to ... mainly central and southern United States., but to south-central Colorado, central New Mexico, and northeastern Mexico. Vagrant: casual west ...

The massive annual spring migration of America's birds – millions of them – is underway. Here's how to follow along at home.