Bats are the only mammals capable of natural flight.
Bats are mammals of the order Chiroptera -LRB- -LSB- karptr -RSB- from the  - cheir , `` hand '' and  - pteron , `` wing '' -RRB- whose forelimbs form webbed wings , making them the only mammals naturally capable of true and sustained flight .	order	Order (biology)	wing	wing	flight	flight
