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Eptesicus fuscus

(big brown bat)

Interesting Facts

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Common Names

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Click on the language to view common names.

Common Names in Czech:

netopýr hnědý

Common Names in English:

big brown bat

Common Names in French:

grande chauve-souris brune

Common Names in Spanish:

Murci, Murciélago-moreno norteamericano, Murciélago-moreno norteamericano

Description

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Habitat

Typically found at an altitude of 0 to 2,793 meters (0 to 9,163 feet).[1]

Ecology: The big brown bat inhabits cities, towns, and rural areas, but is least commonly found in heavily forested regions (Kurta 1995). Some bats require stable, highly insulated environments in order to hibernate. Eptesicus fuscus has a more tolerant constitution so it can winter in less substantial structures. Besides human dwellings, it has been found to take up residence in barns, silos , and churches. Also, this bat has been found roosting in storm sewers, expansion joint spaces in concrete athletic stadiums, and copper mines (Baker 1983). In presettlement times it is presumed the big brown bat roosted in tree hollows, natural caves, or openings in rock ledges. Occasionally groups of these bats are still found living in tree cavities (Baker 1983). Recently, some were found hibernating in caves in Minnesota (Knowles 1992).
The big brown bat hibernates in various structures, either man-made or natural environments. They prefer cool temperatures and can tolerate conditions many other bats cannot. They may become active during their winter hibernacula and can move to an optimum habitat . One banded bat was recorded to have moved to a different cave 400 yards away, during the same winter (Goehring 1972).
E. fuscus is an insectivorous bat. It preys primarily on beetles using its robust skull and powerful jaws to chew through the beetles' hard chitinous exoskeleton. It also eats other flying insects including moths, flies, wasps, flying ants , lacewing flies, and dragonflies (Baker 1983). One study indicated that juvenile E. fuscus ate a greater range of softer food items in their diets , compared to adults . The same study also indicated that bats having survived their first winter (yearlings ), did not differ significantly in diet from the adults (Hamilton and Barclay 1998).[2].

List of Habitats:

Taxonomy

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Notes

Name Status: Accepted Name .

Last scrutiny: 08-Jun-2004

Subgenus Eptesicus. Caribbean forms reviewed by Timm and Genoways (2003).[2].

Similar Species

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Members of the genus Eptesicus

ZipcodeZoo has pages for 48 species and subspecies in this genus:

E. andinus (Little Black Serotinelittle Black Serotine) · E. baverstocki (Inland Forest Bat) · E. bobrinskoi (Bobrinski's Serotine) · E. bottae (Botta's Serotine) · E. brasiliensis (Brazilian Brown Bat) · E. brunneus (Dark-Brown Serotine) · E. capensis (Cape Serotine) · E. chiriquinus (Chiriquinan Serotine) · E. darlingtoni (Large Forest Bat) · E. demissus (Surat Serotine) · E. diminutus (Diminutive Serotine) · E. dimissus (Surat Serotine) · E. douglasorum (Yellow-Lipped Bat) · E. finlaysoni (Big Brown Bats) · E. flavescens (Yellow Serotine) · E. floweri (Horn-Skinned Bat) · E. furinalis (Argentinian Brown Bat) · E. furinalis furinalis (Argentine Brown Bat) · E. fuscus (Big Brown Bat) · E. fuscus fuscus (Big Brown Bat) · E. fuscus wetmorei (Big Brown Bat) · E. gobiensis (Gobi Big Brown Bat) · E. guadeloupensis (Guadeloupean Big Brown Bat) · E. guineensis (Tiny Serotine) · E. hottentotus (Long-Tailed House Bat) · E. innoxius (Harmless Serotine) · E. japonensis (Japanese Short-Tailed Bat) · E. kobayashii (Kobayashi's Serotine) · E. malagasyensis (Isalo Serotine) · E. matroka (Malagasy Serotine) · E. melckorum (Melck's House Bat) · E. nasutus (Sind Serotine Bat) · E. nilssoni (Northern Bat) · E. nilssonii (Northern Bat) · E. nilssoni nilssoni (Northern Bat) · E. pachyotis (Thick-Eared Bat) · E. platyops (Lagos Serotine) · E. pumilus (Eastern Forest Bat) · E. regulus (Southern Forest Bat) · E. rendalli (Rendall's Serotine) · E. sagittula (Large Forest Bat) · E. serotinus (Common Serotine) · E. serotinus pallens (Serotine) · E. somalicus (Somali Serotine) · E. tatei (Sombre Bat) · E. tenuipinnis (White-Winged Serotine) · E. troughtoni (Big Brown Bats) · E. vulturnus (Little Forest Bat)

More Info

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Further Reading

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Notes

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Contributors

Data Sources

Accessed through GBIF Data Portal March 12, 2008:

Identifiers

Footnotes

  1. Mean = 763.190 meters (2,503.904 feet), Standard Deviation = 770.480 based on 1,586 observations. Altitude information for each observation from British Oceanographic Data Centre. [back]
  2. Miller, B., Reid, F., Arroyo-Cabrales, J., Cuarón, A.D. & de Grammont, P.C. 2008. Eptesicus fuscus. In: IUCN 2011. IUCN Red List of Threatened Species. Version 2011.2. <www.iucnredlist.org>. Downloaded on 31 January 2012. [back]
Last Revised: 7/14/2012