Vesper bat

Vesper bat
Vesper Bats
Temporal range: Eocene to Recent[1]
Myotis myotis
Scientific classification
Kingdom: Animalia
Phylum: Chordata
Class: Mammalia
Order: Chiroptera
Suborder: Microchiroptera
Family: Vespertilionidae
Gray, 1821


Vesper bats (family Vespertilionidae), also known as Evening bats or Common bats, are the largest and best-known family of bats. They belong to the suborder Microchiroptera (microbats). There are over three hundred species distributed all over the world, on every continent except Antarctica. It owes its name to the Latin word vespertilio ("bat"), from vesper, meaning "evening."



Molecular data indicates that Vespertilionidae diverged from Molossidae in the early Eocene period. [2] The family is thought to have originated somewhere in Laurasia, possibly North America. [3]


Almost all Vesper bats are insectivores, exceptions being some Myotis and Pizonyx that catch fish and the larger Nyctalus species that have been known on occasion to catch small passerine birds in flight. The dental formula of vesper bats varies between species:


They rely mainly on echolocation, but they lack the enlarged noses that some microbats have in order to improve the ultrasound beam, and instead "shout" through their open mouths to project their ultrasound beam. In compensation many species have relatively large ears.

As a group, Vesper bats cover the full gamut of flight ability with the relatively weak flying Pipistrellus that have fluttery, almost insect-like flight to the long winged and fast flying genera such as Lasiurus and Nyctalus. The family size range is from 3 to 13 cm (1.2 to 5.1 in) in length, excluding the tail, which is itself quite long in most species. They are generally brown or grey in color, but some have brightly colored fur, with reds, oranges, and yellows all being known, and many having white patches or stripes.[4]

Most species roost in caves, although some make use of hollow trees, rocky crevices, animal burrows, or other forms of shelter. There is also a great variation in the size of vesper bat colonies, with some roosting alone, and others in groups of anything up to a million individuals. Species native to temperate latitudes typically hibernate, while a few of the tropical species aestivate.[4]


Four subfamilies are recognized:


The above grouping of subfamilies is the classification according to Simmons and Geisler (1998). Other authorities raise three subfamilies more: Antrozoinae (which is here the separate family of Pallid bats), Tomopeatinae (now regarded as a subfamily of the Free-tailed bats) and Nyctophilinae (here included in Vespertilioninae).


  1. ^ Fenton, M. Brock (2001). Bats. New York: Checkmark Books. pp. 5. ISBN 0-8160-4358-2. 
  2. ^ Miller-Butterworth, C. M., Murphy, W. J., O'Brien, S. J., Jacobs, D. S., Springer, M. S. & Teeling, E. C. 2007. A family matter: conclusive resolution of the taxonomic position of the long-fingered bats, Miniopterus. Molecular Biology and Evolution 24, 1553-1561, cited in Naish, Darren "Introducing the second largest mammalian 'family': vesper bats, or vespertilionids" 2011 retrieved 11-13-2011
  3. ^ Teeling, E. C., Madsen, O., Van Den Bussche, R. A., de Jong, W. W., Stanhope, M. J. & Springer, M. S. 2002. Microbat paraphyly and the convergent evolution of a key innovation in Old World rhinolophoid microbats. Proceedings of the National Academy of Sciences 99, 1431-1436, cited in Naish, Darren "Introducing the second largest mammalian 'family': vesper bats, or vespertilionids" 2011 retrieved 11-13-2011
  4. ^ a b Macdonald, D., ed (1984). The Encyclopedia of Mammals. New York: Facts on File. pp. 807. ISBN 0-87196-871-1. 

Further reading

  • Corbet, GB, Hill JE. 1992. The mammals of the Indomalayan region: a systematic review. Oxford University Press, Oxford.
  • Karim, C., A.A. Tuen and M.T. Abdullah. 2004. Mammals. Sarawak Museum Journal Special Issue No. 6. 80: 221-234.
  • Wilson DE, Reeder DM. 2005. Mammal species of the world. Smithsonian Institution Press, Washington DC.

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