Washington mammals

Trowbridge's Shrew in Washington

Sorex trowbridgii

Native to Washington S5 Secure in Washington

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

Trowbridge's shrew beside a penny for scale, holding food in its mouthAI-generated image: Trowbridge's shrew foraging in deep forest leaf litter. No additional license-safe 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: Trowbridge's shrew climbing a mossy decaying log. No additional license-safe photograph of this species exists. This image was generated with AI from verified reference material and reviewed by our editorial team for accuracy
Photo: bob-dodge · CC BY 4.0Trowbridge's shrew beside a penny for scale, holding food in its mouthAI-generated image No additional license-safe photograph of this species exists. This image was generated with AI from verified reference material and reviewed by our editorial team for accuracyTrowbridge's shrew foraging in deep forest leaf litterAI-generated image No additional license-safe photograph of this species exists. This image was generated with AI from verified reference material and reviewed by our editorial team for accuracyTrowbridge's shrew climbing a mossy decaying log

Trowbridge's Shrew in Washington, by the numbers

Common in Washington 30th most recorded of 145 mammals logged in Washington

4,294 occurrence records
21 with iNaturalist photos
Mar 14, 2026 Last seen in Washington

Records from 2000–2026.

4,294 total records count every Washington occurrence from GBIF and iNaturalist; the map plots a georeferenced sample of 300; the monthly chart covers the 4,291 records with a full observation date.

When to look for the Trowbridge's Shrew in Washington

Most sightings fall in July to August.

4,291 Washington occurrence records (iNaturalist and GBIF) by month of year, 2000–2026. Shows when the species is recorded, not a guarantee of presence.

Monthly Washington records (table)
MonthRecords
January11
February60
March69
April125
May428
June477
July1,159
August1,147
September607
October123
November55
December30

Monthly trowbridge's shrew occurrence records (iNaturalist and GBIF) in Washington, 2000–2026.

Seasonality

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

Occurrence map

Where Trowbridge's Shrew has been recorded in Washington

300 records mapped · zoom and drag to explore

300 Washington records mapped

Notable places to look

Park, forest, or monumentiNaturalist records
Washington State Department of Natural Resources (WADNR) State Resource Management Area 482
Ross Lake National Recreation Area 220
Mount Rainier National Park 184
Lake Chelan National Recreation Area 77
Snoqualmie National Forest 48
Trapper Creek Wilderness 41
Lewis and Clark National Historical Park 34
Tatoosh Wilderness 27

Protected places with the most trowbridge's 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 Washington

CountyRecords
Clallam County 936
Skamania County 539
Thurston County 484
Grays Harbor County 393
Clark County 364
Pierce County 330
Jefferson County 284
Whatcom County 246
King County 241
Lewis County 214
Chelan County 84
Pacific County 75
9 other counties 104

The complete county distribution, spread across 21 Washington counties. Every occurrence record falls in one county, so these sum to the total. Counties from GBIF and US Census boundaries.

The Washington record for trowbridges shrew comprises 4,294 submissions across the 2000–2026 window. iNaturalist supplies 21 records and GBIF 4,289, a contrast explaining why the combined total is not a simple sum. The ranking assigns this record set position 28 in Washington’s 126-mammal comparison.

Seasonally, July leads with 1,159 records, while January has 11. Among named sites, Olympic National Park has 2 linked records, the strongest site-level signal here. Those signals belong to reporting history and should not be treated as relative population size.

Occurrence data from iNaturalist and GBIF.

Trowbridge's shrew beside a penny for scale, holding food in its mouth
Full species profile Trowbridge's Shrew Sorex trowbridgii Size 6.8 cm2.7 in Weight 4 g0.1 oz Lifespan Up to 1.5 yr View the full profile

More mammals in Washington 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"