Utah mammals

Townsend's Big-eared Bat in Utah

Corynorhinus townsendii

Native to Utah S3 Vulnerable in Utah

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

Townsend's Big-eared Bat in Utah, by the numbers

Occasional in Utah 94th most recorded of 141 mammals logged in Utah

238 occurrence records
49 with iNaturalist photos
Feb 24, 2026 Last seen in Utah

Records from 2000–2026.

238 total records count every Utah occurrence from GBIF and iNaturalist; the map plots a georeferenced sample of 237; the monthly chart covers the 235 records with a full observation date.

When to look for the Townsend's Big-eared Bat in Utah

Most sightings fall in August.

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

Monthly Utah records (table)
MonthRecords
January8
February16
March4
April32
May36
June9
July15
August67
September14
October4
November14
December16

Monthly townsend's big-eared bat occurrence records (iNaturalist and GBIF) in Utah, 2000–2026.

Seasonality

Year-round in Utah, with recorded sightings peaking in August.

Occurrence map

Where Townsend's Big-eared Bat has been recorded in Utah

237 records mapped · zoom and drag to explore

237 Utah records mapped

Notable places to look

Park, forest, or monumentiNaturalist records
Red Cliffs National Monument 11
Capitol Reef National Park 9
Bears Ears National Monument 7
Timpanogos Cave National Monument 6
The State of Utah School and Institutional Trust Lands Administration 1144 1
Antelope Island State Park 1
Glen Canyon National Recreation Area 1
Mount Olympus Wilderness 1

Protected places with the most townsend's big-eared 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 Utah

CountyRecords
Utah County 44
Washington County 32
San Juan County 22
Sevier County 21
Sanpete County 21
Millard County 19
Tooele County 14
Wayne County 12
Juab County 10
Cache County 8
Weber County 8
Garfield County 5
10 other counties 22

The complete county distribution, spread across 22 Utah counties. Every occurrence record falls in one county, so these sum to the total. Counties from GBIF and US Census boundaries.

Townsend’s big-eared bat records in Utah center on Snow Canyon State Park, with additional reports from Uinta-Wasatch-Cache National Forest and Fish Springs National Wildlife Refuge, a spread from desert lava-tube country to high forest that matches a bat that roosts in caves, mines, and lava tubes across a wide elevation range.

Utah’s 238 records peak sharply in August, with 67 logged that month, well above the smaller spring bumps in April and May, likely tracking when this whisper-quiet hunter is easiest to detect on acoustic surveys rather than any single seasonal behavior.

NatureServe ranks the species S3, Vulnerable, in Utah, a status that lines up with how easily a disturbed roost can empty out and stay empty for years.

Occurrence data from iNaturalist and GBIF.

More mammals in Utah 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"