Nevada mammals

American Ermine in Nevada

Mustela erminea

Native to Nevada

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

American Ermine in Nevada, by the numbers

Occasional in Nevada 90th most recorded of 142 mammals logged in Nevada

28 occurrence records

Records from 2000–2026.

28 total records count every Nevada occurrence from GBIF and iNaturalist; the map plots a georeferenced sample of 27; the monthly chart covers the 26 records with a full observation date.

When to look for the American Ermine in Nevada

Most sightings fall in July to August.

26 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
March1
April0
May0
June5
July8
August9
September3
October0
November0
December0

Monthly american ermine occurrence records (iNaturalist and GBIF) in Nevada, 2000–2026.

Seasonality

Year-round in Nevada, with recorded sightings peaking in July–August.

Occurrence map

Where American Ermine has been recorded in Nevada

27 records mapped · zoom and drag to explore

27 Nevada records mapped

Notable places to look

Park, forest, or monumentiNaturalist records
Great Basin National Park 5
Pine Forest Range Wilderness Area 1
Toiyabe National Forest 1

Protected places with the most american ermine 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 Nevada

CountyRecords
White Pine County 10
Elko County 8
Mineral County 4
Washoe County 2
Humboldt County 2
Carson City County 1
Other localities 1

The complete county distribution, spread across 6 Nevada counties. Every occurrence record falls in one county, so these sum to the total. Counties from GBIF and US Census boundaries.

Nevada records for the american ermine are anchored by Stillwater National Wildlife Refuge and Ruby Lake National Wildlife Refuge. They show where people have reported it, not how many animals live there.

The Nevada records stretch from southern desert country toward the state’s northern basins. They show a wider in-state footprint than the best-known southern sites alone. The strongest reporting falls in summer, when Nevada’s high country is easiest to reach but low deserts are hottest. That may shape where observers submit records.

The file combines 0 research-grade iNaturalist records and 28 GBIF records. Those 28 records measure documented encounters, not Nevada’s population size. It’s native to Nevada. Nevada doesn’t specifically list it under the state’s conservation framework, and the IUCN lists it as Least Concern.

Occurrence data from iNaturalist and GBIF.

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
  • 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"