Most remarkably, Baminornis had a short tail ending in a pygostyle – a fused bone also found in modern birds. This discovery extends the timeline for the evolution of key bird features by ...

Besides long tails, they evolved a backwards-facing pubic bone, which is also found in modern birds. By becoming reverted, the pubis's weight shifted more toward the animals' tails, making up for ...

a special ridge of bone that runs down the center of the wide sternum, or breastbone. The tail feathers are used for steering. Birds have a unique digestive system that allows them to eat when ...

Red-tailed hawks are known for their brick-colored tails, but there are more than a dozen subspecies of various colorations, and not all of them have this characteristic. These birds of prey are ...

Scientists described two fossilized birds from the Jurassic period ... zhenghensis reveals that it had a short tail ending in a fused bone called a pygostyle, an aerodynamic innovation that ...