Hundreds of millions of birds are taking to the skies each night, southward-bound in search of warmer weather — so many that you can spot them on weather radar. It’s data that researchers can use to ...

Add Yahoo as a preferred source to see more of our stories on Google. Each year, birds set out on their annual spring migration, traveling to their summer feeding grounds. This time of year is when ...

Millions of birds are expected to take flight across the U.S. Saturday night, Sept. 6, as part of their fall migration, according to a nonprofit that tracks bird migrations, although numbers in ...

Add Yahoo as a preferred source to see more of our stories on Google. A map of the bird migration derived from weather radar. (BirdCast) Hundreds of millions of birds are taking to the skies each ...

Each year, birds set out on their annual spring migration, traveling to their summer feeding grounds. This time of year is when local birds that went south for the winter return, or when birds that ...