To test this, she needs the bird to fly the length of the tunnel, which he is stubbornly refusing to do. Suddenly he lets out a chirp, and I watch the green dot flit down the tunnel, pause at the ...

In North America, birds typically fly south for the winter before food ... not location, generally up or down a mountain. Think of the Rocky Mountains and birds such as Clark's nutcracker, the ...

If you've ever flown through a cumulus cloud and felt a push down into your ... This suggests the birds are adapted to extreme environments. "Frigatebirds are generally flying with the wind ...

than it is to tear down a load-bearing wall and rebuild it into something new. Some more recently-evolved feather adaptations, like the asymmetry in the flight feathers that allows birds to fly ...

Everything about the anatomy of a bird reflects its ability to fly. The wings ... a special ridge of bone that runs down the center of the wide sternum, or breastbone. The tail feathers are ...