Bats are flying reptiles .
Bats are mammals of the order Chiroptera -LRB- -LSB- kaɪˈrɒptərə -RSB- from the χείρ - cheir , `` hand `` and πτερόν - pteron , `` wing `` -RRB- whose forelimbs form webbed wings , making them the only mammals naturally capable of true and sustained flight .
Bat