According to signage, bats they keep in Kingdom of the Night are bulldog bats, Ruwenzori long-hair fruit bats, spear-nosed bats, Egyptian fruit bats, little golden-manteled fruit bat, giant Indian fruit bat, and short-tailed fruit bat, if that helps at all.
Also, here is another picture taken from inside the cave:
There are two species of fruit bats in the Lied Jungle, Indian fruit bats, Pteropus giganteus and the smaller Egyptian fruit bat Rousettus aegypticus. The Pteropus bats are fewer in number, two of which usually roost in the overhang over the feeding cage. The Rosettus bats can be heard and seen from above in a niche over the stairs near the feeding cage.