Bat Cave does, indeed, have bats. As typical, these low latitude bats are bigger than mid latitude bats. Unfortunately, none stayed in flight long enough to be caught in pictures while flapping. Note the extraordinary matching of color of bat to environment. The bat is circled because it is so hard to pick out. If you don't believe it really is a bat, take a look at the dark folded wing on the lower right. You can see the bat's thumb sticking up. Also, if you look closely, you can see the slightly lighter brown ear in front of the wing.