Evening bats or, perhaps more correctly, Vesper bats (family Vespertilionidae) are the largest and best-known family of bats. They belong to the suborder Microchiroptera (microbats). There are over 300 species distributed all over the world, on every continent except Antarctica. Sometimes the family is called "common bats". Characteristics Almost all Vesper bats are insect-eaters, exceptions being some Myotis and Pizonyx that catch fish and the larger Nyctalus species that have been known on oc… (More on Vespertilionidae)