We've had lots of close encounters with bats since moving to Merida. Almost all of the houses we have ever looked at that were uninhabited by humans were inhabited by bats. First you'll see the fruit and seeds they've dropped on the floor then you'll see them hanging from the beams or rails in most of the colonial homes. You move in and they move out. Chances are you'll see them again if you have a pool or pond in your garden. I often suggest that people paint their exterior walls in a nice batshit brown or otherwise it will be painted for you... On Yucatan Wildlife's website there are 55 species of bats listed in the Yucatan.

Shortly after moving here I rescued a baby bat after a hurricane. I nursed him with a syringe for 2 or 3 days until he flew away. Years later I discovered he was not a baby at all but a dwarf. Around sunset you'll see the fruit bats come out to eat any ripe fruit the parrots have left on your tree. About this time the entire population of bats will come out and skim your pool and bomb your walls. After dark you'll here the insect eaters out scooping up mosquitos.

I love bats and so should you. Here is the site of a bat sanctuary with a mythbuster article that will change your mind about bats.