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 73rd most recorded of 86 mammals logged in Tennessee

53 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.

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

Monthly Tennessee records (table)
MonthRecords
January6
February12
March7
April3
May0
June3
July8
August1
September3
October3
November4
December3

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

Seasonality

Year-round in Tennessee, with recorded sightings peaking in February, with a smaller rise in July.

Occurrence map

Where Western Little Brown Myotis has been recorded in Tennessee

53 records mapped · zoom and drag to explore

53 Tennessee records mapped

Notable places to look

Park, forest, or monumentiNaturalist records
Great Smoky Mountains National Park 3
Chuck Swan State Forest 2
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
Anderson County 16
Stewart County 4
Davidson County 4
Union County 3
Cheatham County 3
Grundy County 3
Marion County 3
Rhea County 2
Perry County 2
Campbell County 2
Sevier County 2
Sullivan County 2
7 other counties 7

The complete county distribution, spread across 19 Tennessee counties. Every occurrence record falls in one county, so these sum to the total. Counties from GBIF and US Census boundaries.

Tennessee’s western little brown myotis records cluster in the forested mountains of East Tennessee, around Great Smoky Mountains National Park, Cherokee National Forest, and Roan Mountain State Park. The limestone caves and old mine shafts tucked into those 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 53 confirmed records, peaking in February, which likely reflects 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 and GBIF.

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"