Just like humans, there are many different varieties of bats. Some bats feed mainly on insects, others eat fish, or fruits, nectar and pollen, some bats feed on blood, and some bats eat other bats. Some bats are more social, others are more solitary. We usually always associate bats with caves, but different species of bats require different roosting habitats. Some bats roost in caves, some in trees, attics, bat boxes, tree cavities, rock crevices, mines, anywhere they can obtain protective cover.
Echolocation is a method of orientation which uses pulses of sound and their echoes.
It is used to find roosting sites and for detecting prey. But, all of the species of microchiroptera are presumed to echolocate. Bats use other senses like hearing, which is central to echolocation. Sounds are used by bats for communication purposes like attracting mates or calling for their young. Some bats can see very well, and some cannot.