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 23rd most recorded of 77 mammals logged in West Virginia

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

Records from 2000–2026.

52 total records count every West Virginia occurrence from GBIF and iNaturalist; the map plots a georeferenced sample of 48; the monthly chart covers the 48 records with a full observation date.

When to look for the Big Brown Bat in West Virginia

Most sightings fall in May to August.

48 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
January2
February1
March4
April1
May6
June8
July10
August6
September2
October2
November3
December3

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 May–August.

Occurrence map

Where Big Brown Bat has been recorded in West Virginia

48 records mapped · zoom and drag to explore

48 West Virginia records mapped

Notable places to look

Park, forest, or monumentiNaturalist records
Monongahela National Forest 4
New River Gorge National Park and Preserve 2
Little River Wildlife Management Area 1
Rimel Wildlife Management Area 1
Kanawha State Forest 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
Monongalia County 7
Pendleton County 5
Randolph County 3
Fayette County 3
Preston County 3
Pocahontas County 3
Greenbrier County 2
Brooke County 2
Tucker County 2
Kanawha County 2
Summers County 2
Nicholas County 2
11 other counties 16

The complete county distribution, spread across 23 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"