The Wright Brothers studied bird flight before they designed the first airplane. Now modern aircraft fly higher and faster than any bird, yet no manufactured device matches the graceful movements and ...

Airplane wings are modeled after bird wings. The bones and muscles of ... a special ridge of bone that runs down the center of the wide sternum, or breastbone. The tail feathers are used for ...

It flaps on broad wings, and often soars briefly, with wings extended slightly above horizontal as it seemingly floats down to a landing ... 2005 Audubon Christmas Bird Count showed dramatic ...