Bats can see at night by sending out ultrasonic signals that we humans cannot hear. These signals bounce off anything that is in his way and so he can navigate through the air.
Five of the species living on Bonaire are insect-eating bats. Their entire diet consists of insects, including beetles, moths, and the mosquitoes. When you sit down in the porch of your house at sunset you see fast shadows performing gracious dances around you, even entering into your house to get a snack–probably a mosquito that was going to have fun with you the entire night.
One bat can eat about 800 mosquitoes in one night… isn’t that awesome?
The other four bat specie son Bonaire eat pollen and fruits. Bats that eat pollen and take nectar, fly from flower to flower and help the trees produce fruits. Did you know that cacti and calabash trees produce flowers that only open at night? And there are no fruit, pollen or nectar eating birds coming out at night. So only bats can help pollinate these trees to make them produce fruits.
No bats = no new cacti!
Many tropical bat-species need caves as a daytime hiding place. It is also the place where their young are born. Not every cave is suitable for the bats. Most species have specific requirements. It is known that the phantom-faced bat (Mormoops megalophylla) and Long-snout bats(Leptonycteris curasoae)only will live in caves that are very warm. That is why it is incorrect to think that bats will find another cave if they are driven away.