Illinois mammals

Northern Short-tailed Shrew in Illinois

Blarina brevicauda

Native to Illinois S5 Secure in Illinois

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

Northern Short-tailed Shrew in Illinois, by the numbers

Common in Illinois 15th most recorded of 80 mammals logged in Illinois

915 occurrence records
569 with iNaturalist photos
Jun 24, 2026 Last seen in Illinois

915 total records count every Illinois occurrence from GBIF and iNaturalist; the map plots a georeferenced sample of 300; the monthly chart covers the 873 records with a full observation date.

When to look for the Northern Short-tailed Shrew in Illinois

Most sightings fall in August to October.

873 Illinois occurrence records (iNaturalist and GBIF) by month of year. Shows when the species is recorded, not a guarantee of presence.

Monthly Illinois records (table)
MonthRecords
January32
February25
March30
April58
May85
June91
July81
August90
September100
October148
November80
December53

Monthly northern short-tailed shrew occurrence records (iNaturalist and GBIF) in Illinois.

Seasonality

Year-round in Illinois, with recorded sightings peaking in August–October, with a smaller rise in June.

Occurrence map

Where Northern Short-tailed Shrew has been recorded in Illinois

300 records mapped · zoom and drag to explore

300 Illinois records mapped

Notable places to look

Park, forest, or monumentiNaturalist records
Adeline Jay Geo-Karis Illinois Beach State Park 10
Goose Lake Prairie State Natural Area 5
Starved Rock State Park 5
Midewin Other 4
Fermilab Natural Areas 3
Kickapoo State Recreation Area 2
Robert Allerton Park 2
Eldon Hazlet 2

Protected places with the most northern short-tailed 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 Illinois

CountyRecords
Cook County 190
DuPage County 125
Champaign County 113
Lake County 98
Will County 46
Kane County 38
McLean County 33
Kankakee County 25
Winnebago County 22
Jackson County 16
McHenry County 13
LaSalle County 11
49 other counties 185

The complete county distribution, spread across 61 Illinois counties. Every occurrence record falls in one county, so these sum to the total. Counties from GBIF and US Census boundaries.

Northern short-tailed shrew reports bring together Illinois Beach’s lakeshore woods and the shaded ravines at Matthiessen and Starved Rock. Damp leaf litter and dense ground cover link those otherwise different northern Illinois landscapes, giving this small animal places to hunt out of sight.

October stands well above the other months in the reporting pattern, though records occur throughout the year. That may say as much about surveys and detectability as shrew activity, so it isn’t evidence of greater fall abundance.

More mammals in Illinois 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"