The Mexican fruit bat is a medium-sized bat. They have a rubber-like nose leaf, claws on the wrist joint of wings, and a reduced membrane between their hind legs. They also have tiny tubercles on their lower lip. They are the only mammals which fly.
Bats are nocturnal animals.
This means that they sleep during the day and are active at night. Bats are not blind, but they do not usually use their eyes to find food. They have a sophisticated echo location system, similar to sonar. They send a series of sounds through their mouth or nose, then listen for echoes that bounce back when the beeps hit an object. This allows then to tell where an object is and if it is moving.