The bat is a mammalian animal of the order Chiroptera, whose members have a thin skin membrane between the fingers, which extends to the paws and connects to the sides of the body, forming the wings. They are distinguished from birds, as they have bone-supported feathers. Bats are the only mammals with a real flight. In Brazil, the bat can rarely be called by their indigenous names will walk or guandira.
Almost 25% of all known mammals are bats and, throughout the intertropical region, there is a rich fauna consisting of these animals. This group covers 17 families and 177 genera. So far, 21 species of quirópteros have been inventoried in the central-east region, distributed in three families: Phyllostomidae (with 12 species), Vespertilionidae (with seven species) and Molossidae (with two species).
Traditionally, the quirópteros are divided into bats themselves (Suborder Microchiroptera) and flying foxes (Suborder Megachiroptera). They represent a quarter of all mammal species in the world. There are at least 1,116 species, which have a huge variety of shapes and sizes, can have a wingspan of five centimeters to two meters, huge adaptability to almost any environment (only do not occur in the poles) and a wide diversity of eating habits.
Bats have the most varied diet among mammals, as they can eat fruits, seeds, leaves, nectar, pollen, arthropods, small vertebrates, fish and blood. About 70% of bats are insectivores, feeding on insects, being practical all the remaining frugivorous, that is, they feed on fruits. Only three species feed exclusively on blood: they are the so-called hematophagous bats or vampires, found only in Latin America. In this way, bats contribute substantially to the structure and dynamics of ecosystems, as they act as pollinators, seed dispersers, insect predators (including agricultural pests), nutrient suppliers in caves and vectors of wild diseases, among other functions. They also have an extraordinary sense of echolocation (biosonar or echo orientation), which they use for guidance, food search, and communication.