Nevada mammals

Western Little Brown Myotis in Nevada

Myotis lucifugus

Native to Nevada S2 Imperiled in Nevada

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

Little brown myotis roosting alertly on a wooden beamLittle brown myotis roosting in the corner of an attic beamLittle brown myotis roosting on painted wood sidingLittle brown myotis resting among blue spruce branches
Photo: Steph Brulot-Sawchyn · CC0Little brown myotis roosting alertly on a wooden beamPhoto: LeeAnn Latremouille · CC BY 4.0Little brown myotis roosting in the corner of an attic beamPhoto: Tom Romeo · CC BY 4.0Little brown myotis roosting on painted wood sidingPhoto: Patrick Jackson · CC BY 4.0Little brown myotis resting among blue spruce branches

Western Little Brown Myotis in Nevada, by the numbers

Rare in Nevada 122nd most recorded of 142 mammals logged in Nevada

2 occurrence records
2 with iNaturalist photos
Sep 28, 2025 Last seen in Nevada

Records from 2000–2026.

When to look for the Western Little Brown Myotis in Nevada

Most sightings fall in August to September.

2 Nevada 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 Nevada records (table)
MonthRecords
January0
February0
March0
April0
May0
June0
July0
August1
September1
October0
November0
December0

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

Seasonality

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

Occurrence map

Where Western Little Brown Myotis has been recorded in Nevada

2 records mapped · zoom and drag to explore

2 Nevada records mapped

Where it's recorded in Nevada

CountyRecords
Washoe County 1
Elko County 1

The complete county distribution, spread across 2 Nevada counties. Every occurrence record falls in one county, so these sum to the total. Counties from GBIF and US Census boundaries.

Nevada has just 2 western little brown myotis records from 2000 to 2026, one from Washoe County and one from Elko, dated August and September. Two records can document the bat’s presence, but they can’t reveal a hotspot, a season, or how many bats live in the state.

The 2 research-grade iNaturalist records and 2 GBIF records overlap, leaving 2 distinct records. It’s native to Nevada. NatureServe ranks it S2 (Imperiled) in Nevada. The IUCN lists it as Endangered globally.

Occurrence data from iNaturalist and GBIF.

Little brown myotis roosting alertly on a wooden beam
Full species profile Western Little Brown Myotis Myotis lucifugus Size 8–9.5 cm3.1–3.7 in Weight 6–13 g0.2–0.5 oz Lifespan 35 yr View the full profile

More mammals in Nevada 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