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Climate change is shrinking our birds. Birds in both North and South America are getting smaller as the planet warms, and the smallest-bodied species are changing the fastest, a study reported Monday.

A Haast’s eagle attacks a moa pair. John Megahan, PLOS Biology, 3(1): e20 via Wikipedia under CC By 2.5 Evolution has a fondness for big birds. During the past 66 million years, repeated on different ...

Over 30 million birds are expected to land somewhere in Wisconsin on Friday morning after unpredictable weather conditions during this migration season have created an unprecedented peak this year.

More than 100 million birds breed in the region, and many are likely to be vulnerable to the virus, scientists warned. By Emily Anthes Over the last three years, a highly lethal form of avian ...

Just after dawn in Washington, D.C., Stephanie Haley is walking a familiar downtown route, scanning the sidewalk next to office buildings. There, huddled on the ground, is a motionless olive-green ...

Bird migration is on the rise, and so are window collisions. As temperatures slowly drop in Chicago, 300 million to 400 million birds are crossing the continent heading south to their nesting grounds ...