They can climb onto other animals to drink their blood, pluck insects from leaves or hover to drink nectar from tropical flowers, all of which require distinctive wing designs.

Two tiny bird wings were encased in amber. They were 99 million years old, but they looked as though they could take flight any minute: delicate bones were arched in the middle of the wings and ...

Zhenyuanlong suni didn't have wings well suited for flight -- but it did have the feathers one would need to get off the ground.Because of this, they suspect that suni came after a flying ancestor ...