Rafinesque long-eared
| Rafinesque long-eared | ||||||||||||
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Rafinesque long-eared ( Corynorhinus rafinesquii ) |
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| Corynorhinus rafinesquii | ||||||||||||
| ( Lesson , 1827) |
The Rafinesque long-eared bat ( Corynorhinus rafinesquii ) is a species of bat from the smooth-nosed family (Vespertilionidae) that is native to North America. The species is named after the French naturalist Constantine S. Rafinesque-Schmaltz . A synonym for the species is Plecotus rafinesquii , but the genus Plecotus ( long-eared bat ) can only be found in the Palearctic .
description
The total length of the Rafinesque long-eared ear is 80–110 mm, the ears are 27–37 mm, the forearm is 38.8–43.5 mm long, the weight is 7.9–9.5 g in males and 7.9 -13.6 g in females. The Rafinesque long-eared person differs from the Townsend long-eared long-eared ( Corynorhinus townsendii ) and the Mexican long-eared long-eared ( C. mexicanus ) by the two-colored hair with a dark base and an almost white tip. In addition, the species does not overlap in its distribution area with other representatives of this genus, with the exception of the Appalachian Mountains , in which the Rafinesque long-eared occurs together with the Townsend long-eared.
Way of life
The Rafinesque long-eared bats , like most bats, are nocturnal and feed on insects, 90% of which are moths . During the day, the animals are found in colonies in buildings and other man-made structures, as well as in caves and hollow trees. The groups reach a size of over 100 individuals, with those in the north being larger than in the south. The Rafinesque long-eared bat is often found on its hanging place together with the eastern American pipistrelle ( Perimyotis subflavus ), in the southern range sometimes also with Myotis austroriparius and in the north in caves in which the Townsend long-eared bat also lives. Rare to find the kind with the horror mouse ear ( M. grisescens ), M. leibii , M. sodalis , the little brown bat ( Myotis lucifugus ) and the Big Brown Bat . During hibernation , the animals curl their characteristic long ears so that they sit between the head and the folded wings.
Reproduction
The Rafinesque long-eared mate in autumn and gives birth to a single young animal weighing 2.3 to 2.6 g in May or June. Newborns are hairless; the first coat grows after a few days and is darker than the adult animals. After birth, the young cling to their mother's teats and are carried around until they are around three weeks old. Then the animals begin their first flight attempts and shortly afterwards are independent. After a month the young weigh as much as a full-grown animal. After three months, the young change their coat and can then only be distinguished from the other animals by the open epiphyses . The Rafinesque long-eared dog can live to be over ten years.
distribution and habitat
The Rafinesque long-eared long-eared species are found from the east coast of the United States to East Texas . Its population is classified as safe by the IUCN .
literature
- C. Jones (1977): Plecotus rafinesquii . In: Mammalian Species , No. 69, pp. 1-4
swell
- ↑ Hurst, TE, & Lacki, MJ (1997): Food habits of Rafinesque's big-eared bat in southeastern Kentucky . Journal of Mammalogy, 525-528.
- ↑ Corynorhinus rafinesquii in the IUCN Red List of Threatened Species .
