Oregon mammals

California Myotis in Oregon

Myotis californicus

Native to Oregon S3 Vulnerable 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.

California Myotis in Oregon, by the numbers

Rare in Oregon 132nd most recorded of 178 mammals logged in Oregon

206 occurrence records
8 with iNaturalist photos
Sep 20, 2025 Last seen in Oregon

Records from 2000–2026.

206 total records count every Oregon occurrence from GBIF and iNaturalist; the monthly chart covers the 205 records with a full observation date.

When to look for the California Myotis in Oregon

Most sightings fall in August to September.

205 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
February19
March27
April7
May13
June10
July20
August51
September49
October1
November4
December4

Monthly california myotis occurrence records (iNaturalist and GBIF) in Oregon, 2000–2026.

Seasonality

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

Occurrence map

Where California Myotis has been recorded in Oregon

206 records mapped · zoom and drag to explore

206 Oregon records mapped

Notable places to look

Park, forest, or monumentiNaturalist records
Mt. Hood National Forest 5
Malheur National Forest 2
Oregon Caves National Monument and Preserve 2
Oregon Islands National Wildlife Refuge Wilderness Area 1

Protected places with the most california 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
Douglas County 33
Tillamook County 23
Lincoln County 20
Malheur County 19
Wallowa County 16
Coos County 15
Jackson County 10
Washington County 9
Clackamas County 9
Grant County 6
Curry County 6
Lane County 6
13 other counties 34

The complete county distribution, spread across 25 Oregon counties. Every occurrence record falls in one county, so these sum to the total. Counties from GBIF and US Census boundaries.

California myotis are among the smallest bats on the Oregon coast, with a slow, fluttering flight that distinguishes them from the more direct, purposeful flight of larger bat species sharing the same airspace near Cape Perpetua Scenic Area’s rocky headlands.

Records cluster from June through September, led by a September peak, tracking the stretch when summer maternity colonies are most active before bats move to winter roosts. NatureServe ranks the species S3, vulnerable, in Oregon, and its record leans heavily on GBIF specimen data over photographs, a fair reflection of a small, fast-moving bat that’s hard to identify without close examination.

Occurrence data from iNaturalist and GBIF.

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"