Compared to other birds of their size, these guys have a remarkably lightweight bone structure. Most of their bones and subcutaneous tissue contain air sacs, allowing them to remain in the air without ...

A tiny, overlooked wrist bone called the pisiform may have played a pivotal role in bird flight and it turns out it evolved far earlier than scientists thought. Fossils from bird-like dinosaurs in ...

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 ...

Then, the wing flapping starts! The birds continuously flap their wings, pushing their shoulders forward, exposing their bony spurs. It’s the bird equivalent of pulling back your jacket to show an ...