Whether they’re opening for takeoff, spreading wide for a lazy soar or flapping to brake for landing, bird wings make flying ...

Newly discovered feathers were crucial to how Archaeopteryx was able to fly. Archaeopteryx is the fossil that helped confirm ...

"And if you're trying to fly, having a long upper arm bone can create a gap between the long primary and secondary feathers of the wing and the rest of your body. If air passes through that gap ...

The glue trap had been removed but the glue remained on all the primary and secondary feathers of the left wing. The owl was missing half of its rectrices, the larger tail feathers used for ...