Oregon mammals

American Shrewmole in Oregon

Neurotrichus gibbsii

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.

American shrewmole on conifer needles and leaf litterAmerican shrewmole on a mossy forest floor
Photo: Deniz Wilson · CC0American shrewmole on conifer needles and leaf litterPhoto: Tim Gage · CC BY-SA 2.0American shrewmole on a mossy forest floor

American Shrewmole in Oregon, by the numbers

Common in Oregon 51st most recorded of 178 mammals logged in Oregon

882 occurrence records
253 with iNaturalist photos
Jul 6, 2026 Last seen in Oregon

Records from 2000–2026.

882 total records count every Oregon occurrence from GBIF and iNaturalist; the map plots a georeferenced sample of 300; the monthly chart covers the 878 records with a full observation date.

When to look for the American Shrewmole in Oregon

Most sightings fall in October.

878 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
January32
February23
March40
April92
May100
June43
July74
August117
September95
October181
November67
December14

Monthly american shrewmole occurrence records (iNaturalist and GBIF) in Oregon, 2000–2026.

Seasonality

Year-round in Oregon, with recorded sightings peaking in October, with a smaller rise in August.

Occurrence map

Where American Shrewmole has been recorded in Oregon

300 records mapped · zoom and drag to explore

299 Oregon records mapped

Notable places to look

Park, forest, or monumentiNaturalist records
Siuslaw National Forest 8
Mt. Hood National Forest 6
Cascade Range 4
McDonald-Dunn Research Forest 4
Lewis and Clark National Historical Park 4
Three Sisters Wilderness 3
Cape Blanco State Natural Area Reserve 2
Oregon Islands National Wildlife Refuge Wilderness Area 2

Protected places with the most american shrewmole 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
Lane County 204
Douglas County 166
Multnomah County 94
Benton County 57
Tillamook County 54
Lincoln County 48
Clatsop County 47
Linn County 43
Clackamas County 39
Washington County 21
Jackson County 20
Curry County 15
12 other counties 74

The complete county distribution, spread across 24 Oregon counties. Every occurrence record falls in one county, so these sum to the total. Counties from GBIF and US Census boundaries.

American shrew-mole records track Oregon’s moist Cascade forests, with Mount Hood and Willamette national forests among the clearest named areas. April and May form the main seasonal crest, while August and the autumn months contribute a smaller secondary run of records. Collection and chance discovery strongly affect records of this tiny subterranean mammal, so the totals do not indicate abundance.

Occurrence data from iNaturalist and GBIF.

American shrewmole on conifer needles and leaf litter
Full species profile American Shrewmole Neurotrichus gibbsii Size 8.1 cm3.2 in Weight 10 g0.4 oz 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"