squirrels and "flying" lemurs actually glide or parachute by means of a furred membrane, but only bats have the structural adaptations that allow for full powered flight. The structure of the wing ...

bat wings have very little stiffness. They consist of a very flexible membrane of skin stretched across jointed bones which have a low mineral content and therefore high flexibility too.

Scientists also found fragments of bones. The winged dinosaur’s teeth ... researchers found a similar dinosaur species with bat-like wings. In 2015, Chinese scientists unearthed the remains ...