A bat hanging on the ceiling of the cave. Bat claws on all five of its fingers. It also had longer hind legs and shorter forearms, similar to climbing mammals that hang under branches, such as sloths and gibbons. Most bats are nocturnal, and many roost in caves or other refuges. In many cultures, bats are popularly associated with darkness, malevolence, witchcraft and death. Cave wall sleeping resting hanging upside down hand. 4K UHD 3840×2160.