Big-eared bats

Big-eared bats
Common big-eared bat ( Histiotus macrotus )
Systematics
Order : Bats (chiroptera) Superfamily : Smooth-nosed (Vespertilionoidea) Family : Smooth-nosed (Vespertilionidae) Subfamily : True smooth-nosed (Vespertilioninae) Tribe : Vespertilionini Genre : Big-eared bats
Scientific name
Histiotus
Gervais , 1856

The big- eared bats ( Histiotus ) are a species of bat in the smooth-nosed family (Vespertilionidae). The species live in South America.

With a head-to-trunk length of 48 to 70 mm and a weight of 11 to 14 g, these bats are medium-sized representatives of the family. The tail length is 39 to 55 mm, the forearms are 42 to 52 mm long. The fur is predominantly brown in color with dark, gray, or white shades. In some individuals, the underside is light gray. The morphology of the teeth and skull corresponds to that of the broad-winged bats ( Eptesicus ). The Histiotus species, on the other hand, have significantly larger ears. In Histiotus macrotus, these are connected by a strip of skin.

These bats are found in different habitats. Some prefer forests, others are native to the mountains. They use crevices and buildings as resting places, where smaller groups form. Adult males were rarely found in groups with lactating females. A litter usually consists of a young animal that becomes sexually mature after about a year.

The following species belong to the genus.

• The strange big-eared bat ( Histiotus alienus ) occurs in southern Brazil , could be a subspecies of Histiotus montanus .
• The Humboldt big-eared bat ( Histiotus humboldti ) has several populations in Colombia and Venezuela .
• The glass- winged big-eared bat ( Histiotus diaphanopterus ) was only described in 2015 and has several disjoint populations in Brazil and Bolivia.
• The Thomas big-eared bat ( Histiotus laephotis ) can be found from Peru to northern Argentina .
• The common big-eared bat ( Histiotus macrotus ) occurs from Peru to central Chile and western Argentina.
• The southern big-eared bat ( Histiotus magellanicus ) with a distribution area from central Chile to Tierra del Fuego .
• The large-eared bat ( Histiotus montanus ) lives in western and southern South America.
• The tropical big-eared bat ( Histiotus velatus ) has two populations in Bolivia and eastern Brazil.

Individual evidence

1. ↑ ^{a b} Don E. Wilson , DeeAnn M. Reeder (Ed.): Mammal Species of the World . A taxonomic and geographic Reference . 3. Edition. 2 volumes. Johns Hopkins University Press, Baltimore MD 2005, ISBN 0-8018-8221-4 (English, Histiotus ).
2. ↑ ^{a b} Ronald M. Nowak: Walker's Mammals of the World. Volume 1. 6th edition. Johns Hopkins University Press, Baltimore MD et al. 1999, p. 444, ISBN 0-8018-5789-9 . ( Big-eared Brown Bats )
3. ↑ Histiotus in the IUCN 2014 Red List of Threatened Species . Accessed April 3, 2015.

Web links

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