Evening bats (family Vespertilionidae) are the largest and best-known family of bats. They belong to the suborder Microchiroptera (microbats).There are 300 species distributed all over the world, many of them native to Europe and North America. Sometimes the family is called "common bats".
All evening bats are insect-eaters. They rely mainly on echolocation, but they lack the enlarged noses, which some microbats have in order to improve the ultrasound beam. In compensation many species have large ears. Evening bats are 3 to 13 cm long.