Tennessee mammals

Eastern Harvest Mouse in Tennessee

Reithrodontomys humulis

Native to Tennessee S5 Secure in Tennessee

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

Eastern Harvest Mouse in Tennessee, by the numbers

Occasional in Tennessee 41st most recorded of 86 mammals logged in Tennessee

189 occurrence records
4 with iNaturalist photos
Feb 1, 2025 Last seen in Tennessee

Records from 2000–2026.

189 total records count every Tennessee occurrence from GBIF and iNaturalist; the monthly chart covers the 171 records with a full observation date.

When to look for the Eastern Harvest Mouse in Tennessee

Most sightings fall in March.

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

Monthly Tennessee records (table)
MonthRecords
January22
February5
March26
April14
May11
June20
July12
August2
September4
October14
November21
December20

Monthly eastern harvest mouse occurrence records (iNaturalist and GBIF) in Tennessee, 2000–2026.

Seasonality

Year-round in Tennessee, with recorded sightings peaking in March, with a smaller rise in June and November–January.

Occurrence map

Where Eastern Harvest Mouse has been recorded in Tennessee

189 records mapped · zoom and drag to explore

189 Tennessee records mapped

Notable places to look

Park, forest, or monumentiNaturalist records
Three Bend Scenic & Wildlife Refuge 5
Big Hill Pond 2
Great Smoky Mountains National Park 2
Pickett 1

Protected places with the most eastern harvest mouse 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 Tennessee

CountyRecords
Gibson County 44
Campbell County 25
Shelby County 19
Marion County 15
Decatur County 14
Perry County 11
Fayette County 9
Haywood County 9
Sevier County 7
Knox County 6
Benton County 5
Davidson County 4
13 other counties 21

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

Nearly all of Tennessee’s eastern harvest mouse records, 186 of 190, come from GBIF specimen and survey data rather than iNaturalist photographs; only four sightings were logged as casual observations. That split suggests this mouse is documented mostly through trapping surveys and museum records, not backyard photos, which fits a small, secretive rodent that’s easy to miss without deliberately searching grassy cover.

January stands out sharply in the record count: 19 entries, more than double any other month, while summer drops to one or two. A single well-timed survey could easily explain a spike like that in a dataset this size, so the January peak likely reflects when researchers were in the field rather than a true seasonal high for the species.

Occurrence data from iNaturalist and GBIF.

More mammals in Tennessee 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"