About Vespertilio murinus Linnaeus, 1758
The parti-coloured bat, scientifically named Vespertilio murinus Linnaeus, 1758, produces a twittering call similar to a bird’s call that is most often heard in autumn during its mating season. This bat has a body length of 4.8–6.4 centimetres (1.9–2.5 in), a wingspan of 26–33 cm (10–13 in), and a body weight of 11–24 grams (0.39–0.85 oz). Its common name comes from its two-toned fur. The dorsal (back) side of its body ranges from red to dark brown, and is covered with silver-white-frosted hair, while the ventral side is white or grey. Its ears, wings, and face are black or dark brown. The wings are narrow, and the ears are short, broad, and roundish. This species is known to live up to 12 years. The parti-coloured bat is distributed across Central and Western Europe, as well as Asia. Its natural habitats are mountains, steppes, and forested areas, though in Western Europe the species is mainly found living in cities. The parti-coloured bat is a protected species, as it faces threats from insecticides and changes to its habitat. During May and July, females of the species form maternity roosts, and most give birth to twins. Young are typically born around the beginning of June in western Europe. Pups are weaned in less than six weeks, after which females leave the maternity roost.
