Just like fish dominate the underwater domain, birds are the rulers of the skies. The same properties of physics that have set airplanes aloft have also propelled birds for millennia. But aside from feathers and flight, how much do you really know about these winged creatures? See more »

Hummingbirds almost never stop moving, and their legs are small and weak. So do hummingbirds do everything in midair -- even mate? See more »

Penguins and puffins might love formal wear and waddling, but the similarities end there. These fish-loving birds don't see eye to eye on issues like transportation and real estate. See more »

Bee Eater, a bird related to the kingfisher. It is found in Africa, India, Australia, Europe, and islands of the South Pacific. See more »

Bird, the only animal with feathers. All birds have feathers and most birds can fly. See more »

Cassowary, a large, flightless bird related to the emu and ostrich. It inhabits rain forests in New Guinea, Australia, and nearby islands. See more »

Cock of the Rock, a bird of tropical South America named for its habit of building its nest on top of rocks. See more »

Cuckoo, one of a large, diverse family of birds found all over the world. In addition to cuckoos, the family includes several species of anis (black cuckoos) and the roadrunner. See more »

Emu, a large flightless bird of Australia. It is a ratite (one of a group of flightless birds, which includes the ostrich, cassowary, and kiwi). See more »

Goatsucker, or Nightjar, a migratory, night-flying bird of Europe and North America. See more »