Florida mammals

Eastern Harvest Mouse in Florida

Reithrodontomys humulis

Native to Florida SNR Unranked in Florida

Not listed as nonindigenous in Florida by USGS NAS; native to its Florida 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 Florida, by the numbers

Occasional in Florida 41st most recorded of 116 mammals logged in Florida

206 occurrence records
2 with iNaturalist photos
Dec 28, 2022 Last seen in Florida

Records from 2000–2026.

206 total records count every Florida occurrence from GBIF and iNaturalist; the monthly chart covers the 163 records with a full observation date.

When to look for the Eastern Harvest Mouse in Florida

Most sightings fall in March to April.

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

Monthly Florida records (table)
MonthRecords
January6
February15
March27
April32
May10
June6
July20
August17
September4
October7
November13
December6

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

Seasonality

Year-round in Florida, with recorded sightings peaking in March–April, with a smaller rise in July.

Occurrence map

Where Eastern Harvest Mouse has been recorded in Florida

206 records mapped · zoom and drag to explore

206 Florida records mapped

Notable places to look

Park, forest, or monumentiNaturalist records
Paynes Prairie Preserve State Park 2
Blackwater River State Forest 1
Silver River State Park 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 Florida

CountyRecords
Alachua County 79
Citrus County 22
Leon County 20
Polk County 15
Osceola County 14
Sumter County 11
Marion County 10
Sarasota County 8
Highlands County 3
Wakulla County 2
Indian River County 2
Washington County 2
12 other counties 18

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

Florida’s 206 eastern harvest mouse records rely almost entirely on GBIF specimen data, with only 2 coming from iNaturalist. That split suggests most of what’s known about this small grassland mouse in Florida comes from museum and survey collections rather than casual sightings.

Records peak in April, the year’s clear high point, easing off through the rest of the year. Small mammals like this one are typically detected through targeted trapping, so the April rise likely tracks survey timing more than any true seasonal shift in the mouse’s own activity.

Occurrence data from iNaturalist and GBIF.

More mammals in Florida in the atlas

Data & sources

The data and visualizations on this page draw on these open sources: