What exactly is this unusual blue sea creature? Get to know one of the more unusual members of the sea slug family in our quick look.

Carl says he spun around, spotted the source and immediately realized it was a hummingbird species not normally found locally ...

U.S. bird populations are experiencing alarming declines due to factors such as habitat loss and climate change, according to ...

Extinction troubled us long before we had a name for it. The original mascot for the loss of species, even before the concept was understood, was the dodo. The bird — fat and flightless, found by 17th ...