West Virginia mammals

Big Brown Bat in West Virginia

Eptesicus fuscus

Native to West Virginia S5 Secure in West Virginia

Not listed as nonindigenous in West Virginia by USGS NAS; native to its West Virginia range.

IUCN Red List status

  1. LC
  2. NT
  3. VU
  4. EN
  5. CR
  6. EW
  7. EX

LC – Least Concern

Widespread and abundant; not at risk.

Big Brown Bat in West Virginia, by the numbers

Common in West Virginia 25th most recorded of 77 mammals logged in West Virginia

100 occurrence records
49 with iNaturalist photos
Mar 15, 2026 Last seen in West Virginia

Records from 2000–2026.

100 total records count every West Virginia occurrence from GBIF and iNaturalist; the map plots a georeferenced sample of 99; the monthly chart covers the 91 records with a full observation date.

When to look for the Big Brown Bat in West Virginia

Most sightings fall in February.

91 West Virginia occurrence records (iNaturalist and GBIF) by month of year, 2000–2026. Shows when the species is recorded, not a guarantee of presence.

Monthly West Virginia records (table)
MonthRecords
January3
February20
March9
April8
May7
June10
July11
August7
September3
October2
November3
December8

Monthly big brown bat occurrence records (iNaturalist and GBIF) in West Virginia, 2000–2026.

Seasonality

Year-round in West Virginia, with recorded sightings peaking in February.

Occurrence map

Where Big Brown Bat has been recorded in West Virginia

99 records mapped · zoom and drag to explore

99 West Virginia records mapped

Notable places to look

Park, forest, or monumentiNaturalist records
Monongahela National Forest 5
New River Gorge National Park and Preserve 2
Rimel Wildlife Management Area 1
Little River Wildlife Management Area 1

Protected places with the most big brown bat sightings, from the USGS Protected Areas Database plus named mountain ranges, good spots to look, not a full breakdown, so they don't sum to the total.

Where it's recorded in West Virginia

CountyRecords
Greenbrier County 33
Pendleton County 13
Monongalia County 10
Jefferson County 5
Randolph County 4
Fayette County 3
Preston County 3
Pocahontas County 3
Brooke County 3
Nicholas County 2
Summers County 2
Tucker County 2
14 other counties 17

The complete county distribution, spread across 26 West Virginia counties. Every occurrence record falls in one county, so these sum to the total. Counties from GBIF and US Census boundaries.

Big brown bats forage throughout West Virginia over streams, forest openings, and towns, and often roost in buildings as well as trees and caves. Summer dusk watches near water at New River Gorge, Blackwater Falls, or developed parts of Monongahela National Forest offer the best chance to see their strong, direct flight.

Reports are concentrated from June through August, when bats are active above ground and people spend more evenings outdoors. Winter observations are exceptional because hibernating bats should not be disturbed or approached in caves.

Occurrence data from iNaturalist and GBIF.

More mammals in West Virginia in the atlas

Data & sources

The data and visualizations on this page draw on these open sources:

  • GBIFCC-BY 4.0occurrence records behind the range map, elevation, and record counts
  • iNaturalistCC0 / CC-BY / CC-BY-SAobservations, photos, and audio recordings
  • NatureServe ExplorerCC-BYthe state conservation rank
  • IUCN Red Listattributed factthe global conservation status
  • USGS NASpublic domainnative / introduced status
  • Natural Earthpublic domainthe relief basemap
  • USFSpublic domainnational-forest boundaries
  • USGS Protected Areas Databasepublic domainthe named parks, forests, and refuges behind "notable places to look"