Oregon mammals

Fog shrew in Oregon

Sorex sonomae

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.

AI-generated image: Fog shrew in side profile on damp forest floor with ferns. No public-domain photograph of this species exists. This image was generated with AI from verified reference material and reviewed by our editorial team for accuracyAI-generated image: Fog shrew foraging nose-down in wet leaf litter among moss. No public-domain photograph of this species exists. This image was generated with AI from verified reference material and reviewed by our editorial team for accuracy
AI-generated image No public-domain photograph of this species exists. This image was generated with AI from verified reference material and reviewed by our editorial team for accuracyFog shrew in side profile on damp forest floor with fernsAI-generated image No public-domain photograph of this species exists. This image was generated with AI from verified reference material and reviewed by our editorial team for accuracyFog shrew foraging nose-down in wet leaf litter among moss

Fog shrew in Oregon, by the numbers

Common in Oregon 25th most recorded of 178 mammals logged in Oregon

903 occurrence records

Records from 2000–2026.

903 total records count every Oregon occurrence from GBIF and iNaturalist; the map plots a georeferenced sample of 300; the monthly chart covers the 896 records with a full observation date.

When to look for the Fog shrew in Oregon

Most sightings fall in October.

896 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
January23
February6
March13
April78
May98
June21
July89
August88
September3
October334
November129
December14

Monthly fog shrew occurrence records (iNaturalist and GBIF) in Oregon, 2000–2026.

Seasonality

Year-round in Oregon, with recorded sightings peaking in October.

Occurrence map

Where Fog shrew has been recorded in Oregon

300 records mapped · zoom and drag to explore

300 Oregon records mapped

Notable places to look

Park, forest, or monumentiNaturalist records
Siuslaw National Forest 29
E.E. Wilson Wildlife Area 2
Siskiyou National Forest 2
Rock Creek Wilderness 1

Protected places with the most fog shrew 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 425
Lane County 188
Lincoln County 156
Coos County 49
Benton County 26
Josephine County 24
Jackson County 13
Curry County 10
Tillamook County 5
Harney County 4
Linn County 1
Clackamas County 1
Other localities 1

The complete county distribution, spread across 12 Oregon counties. Every occurrence record falls in one county, so these sum to the total. Counties from GBIF and US Census boundaries.

October accounts for 22 of the 34 observations in Oregon’s monthly series, followed by seven in November; the remaining reports fall in June, August, and September. The Oregon Dunes, Cape Perpetua, and coastal estuaries and state parks are the overlay’s search suggestions, and the state rank is S4 (Apparently Secure). This seasonal concentration is a pattern in records, not a measure of abundance or proof that the shrew is absent in other months or places.

AI-generated image: Fog shrew in side profile on damp forest floor with ferns. No public-domain photograph of this species exists. This image was generated with AI from verified reference material and reviewed by our editorial team for accuracy
Full species profile Fog shrew Sorex sonomae Size 7.1 cm2.8 in Weight 6 g0.2 oz Lifespan Up to 2.1 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"