New study sees sky layers as living environments for various species of animals as they navigate through the air.

High above us, the atmosphere is teeming with life. Birds, bats and insects share the airspace, but divide it into different ...

After nearly 25 years of research, the mystery has finally been solved: Europe's largest bat doesn't just eat small birds—it ...

Bird advocates are urging Wisconsin residents to turn off outdoor lights after dark Oct. 10 to help protect birds migrating ...