Among the roughly 10,000 known bird species on Earth, only one family can sustain true backward flight. Hummingbirds achieve ...

Modern birds capable of flight all have a specialized wing structure called the propatagium without which they could not fly. The evolutionary origin of this structure has remained a mystery, but new ...

A team of researchers affiliated with several institutions in China, the U.S. and Germany has found evidence that suggests that colorful ventral wings help colonizing birds to avoid running into one ...

Bird physiology is conducive to flight: small size, hollow bones, and generally symmetrical feathers on the wings and tail. It seems like a no-brainer that bird evolution was optimized for flight, but ...

Climate change is shrinking our birds. Birds in both North and South America are getting smaller as the planet warms, and the smallest-bodied species are changing the fastest, a study reported Monday.