Fish with transparent heads? Crabs with 13-foot legs? These are some of the bizarre-looking sea creatures found lurking on the ocean floor!

Unlike birds whose plumage is mostly blue, the green coloring of a green bird’s feathers is the result of pigment, not a ...

A first-ever collaboration between the National Gallery of Art and the Smithsonian examines the birth of natural history.

Learn what an adult and juvenile black-crowned night-heron looks like. Plus, find out where you can see one of these wading ...

These swallows peck at the ground for food or fly over to the bird bath for a sip of clean filtered water or fly over to another tree. At times these curious and inquisitive swallows land on the very ...