Oregon mammals

Western Small-footed Myotis in Oregon

Myotis ciliolabrum

Native to Oregon S4 Apparently Secure in Oregon

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

Western small-footed myotis roosting on wood with its dark face mask visibleSmall group of western small-footed myotis roosting under a beamWestern small-footed myotis hanging against a pale roost surfaceWestern small-footed myotis showing small feet and folded dark wingsClose view of a western small-footed myotis face and dark ears in a narrow roost
Photo: Colin Croft · CC BYWestern small-footed myotis roosting on wood with its dark face mask visiblePhoto: Colin Croft · CC BYSmall group of western small-footed myotis roosting under a beamPhoto: Colin Croft · CC BYWestern small-footed myotis hanging against a pale roost surfacePhoto: Colin Croft · CC BYWestern small-footed myotis showing small feet and folded dark wingsPhoto: Colin Croft · CC BYClose view of a western small-footed myotis face and dark ears in a narrow roost

Western Small-footed Myotis in Oregon, by the numbers

Occasional in Oregon 106th most recorded of 178 mammals logged in Oregon

32 occurrence records

Records from 2000–2026.

When to look for the Western Small-footed Myotis in Oregon

Most sightings fall in July to August.

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

Monthly Oregon records (table)
MonthRecords
January0
February0
March0
April1
May0
June3
July10
August16
September1
October1
November0
December0

Monthly western small-footed myotis occurrence records (iNaturalist and GBIF) in Oregon, 2000–2026.

Seasonality

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

Occurrence map

Where Western Small-footed Myotis has been recorded in Oregon

32 records mapped · zoom and drag to explore

32 Oregon records mapped

Notable places to look

Park, forest, or monumentiNaturalist records
Mt. Hood National Forest 1

Protected places with the most western small-footed 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 Oregon

CountyRecords
Lake County 16
Malheur County 11
Crook County 2
Grant County 1
Harney County 1
Wasco County 1

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

Oregon’s month series is narrowly concentrated: two western small-footed myotis observations occur in July and 14 in August. The overlay highlights Malheur National Wildlife Refuge, Steens Mountain, and John Day Fossil Beds, while NatureServe assigns an S4 (Apparently Secure) state rank. Sixteen encounters cannot measure abundance or define the full flight season, and missing records elsewhere do not demonstrate absence.

Western small-footed myotis roosting on wood with its dark face mask visible
Full species profile Western Small-footed Myotis Myotis ciliolabrum Size 8–10 cm3.1–3.9 in Weight 4–5 g0.1–0.2 oz Lifespan 12 yr View the full profile

More mammals in Oregon 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"