Tennessee mammals

Western Little Brown Myotis in Tennessee

Myotis lucifugus

Native to Tennessee S3 Vulnerable in Tennessee

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

IUCN Red List status

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

EN – Endangered

Very high risk of extinction in the wild.

Western Little Brown Myotis in Tennessee, by the numbers

Rare in Tennessee 71st most recorded of 86 mammals logged in Tennessee

4 occurrence records
4 with iNaturalist photos
Jul 12, 2025 Last seen in Tennessee

Records from 2000–2026.

When to look for the Western Little Brown Myotis in Tennessee

Most sightings fall in February to March.

4 Tennessee occurrence records (iNaturalist and GBIF) by month of year, 2000–2026. Shows when the species is recorded, not a guarantee of presence. Based on a small number of dated records; the seasonal pattern may not be representative.

Monthly Tennessee records (table)
MonthRecords
January0
February1
March1
April0
May0
June0
July1
August0
September1
October0
November0
December0

Monthly western little brown myotis occurrence records (iNaturalist and GBIF) in Tennessee, 2000–2026.

Seasonality

Sparse observation record in Tennessee; presence confirmed but timing of activity not well documented.

Occurrence map

Where Western Little Brown Myotis has been recorded in Tennessee

4 records mapped · zoom and drag to explore

4 Tennessee records mapped

Notable places to look

Park, forest, or monumentiNaturalist records
Bays Mountain Park Designated State Natural Area 1
Chickamauga and Chattanooga National Military Park 1

Protected places with the most western little brown myotis 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 Tennessee

CountyRecords
Sullivan County 2
Campbell County 1
Hamilton County 1

The complete county distribution, spread across 3 Tennessee counties. Every occurrence record falls in one county, so these sum to the total. Counties from GBIF and US Census boundaries.

Tennessee’s few western little brown myotis records all come from East Tennessee, at Bays Mountain Park near Kingsport and Chickamauga and Chattanooga National Military Park, plus one from Campbell County. The limestone caves and old mine shafts tucked into the region’s ridges are exactly the kind of hibernation site this bat depends on.

A colonial bat built for water and warmth

Unlike Tennessee’s solitary tree bats, this species gathers in groups, sometimes by the thousands, in caves, hollow trees, and buildings. It hunts low over ponds and slow rivers for moths and mosquitoes, and mothers raise a single pup each year in warm, crowded nursery roosts.

A thin record in a hard-hit range

Tennessee has only 4 confirmed records, one each in February, March, July, and September, too few to show a seasonal pattern and likely a sign of how few people survey hibernating colonies rather than the bat’s true presence. East Tennessee’s caves sit within the range where white-nose syndrome has hit hibernating colonies hardest since the disease reached the region, part of why this once-common bat is now rated Endangered.

Occurrence data from iNaturalist.

More mammals in Tennessee 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"