Study Finds That Birds-of-Paradise Are Biofluorescent Research suggests that "hidden" phenomenon provides enhanced signaling for hierarchy and courtship.

Use expert tips and a helpful chart to improve your hawk identification skills. Plus, learn about the common types of hawks ...

There are over 10,000 species of birds in the world. Some, like the bumblebee hummingbird, are very small. Others, like the common ostrich, do not fly. If you consider birds that fly, then these are ...