Pipistrellus pipistrellus, or the Common Pipistrelle, is found throughout Europe, including the northern countries, such as England, Ireland and even reaching Southern Scandinavia. Its range extends eastward through Asia to China and perhaps Korea, Japan, and Taiwan.

Biogeographic Regions: palearctic (Native ); oriental (Native )

The Common Pipistrelle is one of the smallest bats. It has a wingspan between 180-240mm, and its wings are narrow. Like other bats in the Vespertilionidae, Pipistrellus pipistrellus has a tragus, and in this species, the tragus is rounded at the top and quite long. The pelage is usually brown, but other colors, such as chesnut and dark brown have also been observed. Their wing and tail membranes are dark brown, and they do not have any fur on them. Cranial characertistics include a dental formula of 2/3,1/1,2/2,3/3, no postorbital process, and a separated premaxillae that is fused to the maxillae.

Range mass: 3.5 to 8 g.

• Terrestrial

This species is very common in both towns and cities. It can also be found in parks and forests. During the summer months, it can be found in cracks on the outside of buildings, behind shutters, and unfinished houses. Pipistrellus pipistrellus have been discovered in winter roosts in churches, limestone mines, cracks in walls, and cellars.

Terrestrial Biomes: savanna or grassland ; forest

Like other microchiropterans, Pipistrellus pipistrellus uses echolocation to locate its prey. It usually follows a set flight path each day, hunting over ponds and gardens where insects are usually located. The Common pipistrelle feeds on mosquitos, small moths and other insects.

Average lifespan

Status: wild: 9.0 years.

Females of this species become sexually mature in their first year and mate, while males usually become sexually mature in their second year. During the mating season (late August to late September) females can be found roosting in maternity roosts. Within these roosts, males occupy a and defend a specific territory. Courtship includes courtship flights and the emission of a strong musky odor by the males. If mating occurs at an inopportune time, females are able to delay the onset of fertilization by a process called delayed fertilization, which is a common characteristic in the Vespertilionidae. Females usually give birth to twins in June to early July. These youngsters are able to fly by three to four weeks of age.

Range number of offspring: 1 to 2.

Range gestation period: 35 to 51 days.

Average weaning age: 42 days.

Key Reproductive Features: seasonal breeding ; gonochoric/gonochoristic/dioecious (sexes separate); viviparous ; sperm-storing

Average birth mass: 1.125 g.

Average number of offspring: 1.2.

Average age at sexual or reproductive maturity (male)

Sex: male: 456 days.

Average age at sexual or reproductive maturity (female)

Sex: female: 456 days.

The Common Pipistrelle is endangered in Austria and Germany, even though it is very common in other areas of Europe. It is important to protect the maternal roosting sites in order to ensure the continual survival of this species.

US Federal List: no special status

CITES: no special status

IUCN Red List of Threatened Species: least concern

Like other bat species, the Common Pipistrelle is an important aspect of ecological systems. They are important predators of insects, helping to keep insect populations in check.