Common pipistrelle

It was described as a new species in 1774 by German naturalist Johann Christian Daniel von Schreber. Schreber initially placed it in the genus Vespertilio, calling it Vespertilio pipistrellus. In 1839, Keyserling and Blasius reclassified the species, naming it Vesperugo pipistrellus. This classification stood until 1897, when Miller placed the species into the genus Pipistrellus, where it remains as Pipistrellus pipistrellus. Its species name "pipistrellus" is derived from the Italian word , which means "bat." The soprano pipistrelle, Pipistrellus pygmaeus, was formerly considered synonymous with the common pipistrelle. In 1999, it was formally split from the common pipistrelle based on differing echolocation signatures and a genetic divergence of 11%. Despite being different species, the common pipistrelle and the soprano pipistrelle are able to hybridize, based on genetic analysis conducted in Poland. ==Description==

The common pipistrelle is a very small species of bat. Its forearm is long. It has a short muzzle. It is long along the head-and-body, with the tail adding . The body mass can range from , with the wingspan ranging from . Its brown fur is variable in tone. It is common in woodland and farmland but is also found in towns, where the females roost in lofts and buildings when rearing young. ==Biology and ecology==

Reproduction Males attract females by creating courtship territories approximately in diameter; these territories are maintained from mid-July through the end of October, with particularly intense activity in September. Courtship territories are usually in the vicinity of popular winter roosts for the species. Males will patrol these territories while "singing" to attract the attention of female bats as they travel to winter roosts. Male courtship territories are densely-packed, offering female choice akin to a lek mating system. While copulation occurs in the fall, fertilization does not occur until after its hibernation due to female sperm storage. Females are pregnant in May and June. Pregnant females form large aggregations in roosts, called maternity colonies. Colonies can consist of dozens or hundreds of individuals. Parturition usually occurs in June. It is insectivorous, preying on flies, caddisflies, lacewings, mayflies, and moths. Mosquitoes, midges, and gnats are particularly favored prey items. Echolocation The frequencies used by this bat species for echolocation lie between 45 and 76 kHz, have most energy at 47 kHz and have an average duration of 5.6 ms. ==Range and habitat==

It has a Palearctic distribution. It occurs in the British Isles, southern Scandinavia, much of Continental Europe, and parts of Northwest Africa. It is also found in India, China, and Myanmar in Asia. ==Conservation==

It has been called the most common and abundant species of bat in Continental Europe and the United Kingdom. Notably, however, these judgments were made before it was split into two species in 1999. The common pipistrelle is considered least concern by the IUCN. It meets the criteria for this classification because it has a large geographic range and a presumed large population. As of 2008, the IUCN noted that there was no evidence of a rapid population decline. ==Further reading==