Idaho mammals

Silver-haired Bat in Idaho

Lasionycteris noctivagans

Native to Idaho S3 Vulnerable in Idaho

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

Silver-haired bat tucked into loose barkSilver-haired bat roosting against barkSilver-frosted back of a silver-haired batLive silver-haired bat perched on a rock face
Photo: Mark Richman · CC BY 4.0Silver-haired bat tucked into loose barkPhoto: David LaMagna · CC BY 4.0Silver-haired bat roosting against barkPhoto: David LaMagna · CC BY 4.0Silver-frosted back of a silver-haired batPhoto: Jeff Bartlett · CC BY 4.0Live silver-haired bat perched on a rock face

Silver-haired Bat in Idaho, by the numbers

Occasional in Idaho 71st most recorded of 123 mammals logged in Idaho

63 occurrence records
31 with iNaturalist photos

Records from 2000–2026.

63 total records count every Idaho occurrence from GBIF and iNaturalist; the map plots a georeferenced sample of 49; the monthly chart covers the 49 records with a full observation date.

When to look for the Silver-haired Bat in Idaho

Most sightings fall in August to September.

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

Monthly Idaho records (table)
MonthRecords
January1
February0
March0
April0
May8
June3
July6
August13
September13
October5
November0
December0

Monthly silver-haired bat occurrence records (iNaturalist and GBIF) in Idaho, 2000–2026.

Seasonality

Year-round in Idaho, with recorded sightings peaking in August–September, with a smaller rise in May.

Occurrence map

Where Silver-haired Bat has been recorded in Idaho

49 records mapped · zoom and drag to explore

49 Idaho records mapped

Notable places to look

Park, forest, or monumentiNaturalist records
Three Island Crossing State Park 1

Protected places with the most silver-haired 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 Idaho

CountyRecords
Ada County 11
Kootenai County 4
Idaho County 4
Bonner County 4
Madison County 3
Valley County 3
Bannock County 3
Clearwater County 3
Adams County 3
Bonneville County 2
Twin Falls County 1
Minidoka County 1
7 other counties 21

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

Silver-haired bat records in Idaho cluster around Deer Flat and Camas national wildlife refuges and the Snake River corridor, water-edge habitat that fits a bat known for roosting under loose bark and in old woodpecker holes rather than caves.

The double seasonal peak, May and again August through October, tracks spring and fall migration rather than summer residency, since this species passes through much of Idaho on its way between wintering and breeding range. NatureServe ranks the species S3, Vulnerable, in Idaho.

Occurrence data from iNaturalist and GBIF.

Silver-haired bat tucked into loose bark
Full species profile Silver-haired Bat Lasionycteris noctivagans Size 9.5–11.5 cm3.7–4.5 in Weight 11 g0.4 oz Lifespan 12 yr View the full profile

More mammals in Idaho 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"