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Simply so, what are bat wings called?
A bat has a much more flexible wing structure. It is very much like a human arm and hand, except it has a thin membrane of skin (called the patagium) extending between the "hand" and the body, and between each finger bone. Appropriately, the order of bats is called Chiroptera, Greek for "hand-wing."
Regarding this, what does a bat wing feel like?
It's warm and stretchy — so touching the wing of a bat feels like touching the skin on your arm. Of course, most of the bat is covered with fur, and it's very soft fur like on a kitten.
Bat wings consist of flaps of skin stretched between the bones of the fingers and arm. Bird wings consist of feathers extending all along the arm. Birds and bats did not inherit wings from a common ancestor with wings, but they did inherit forelimbs from a common ancestor with forelimbs.