It's almost easy to miss them, but if you look at the underside of the tree you see a row of bats sleeping in a vertical line! Look at the crazy "face" pattern on their backs to keep predators away! It looks like a tiny, scotty-dog face!
Later on, things suddenly got not-so-quiet. Because there were thousands of bats alerted to our intruder-presence, making noise. I managed to snap this pic of this sleepy lil' critter.