Florida mammals

Oldfield Mouse in Florida

Peromyscus polionotus

Native to Florida S5 Secure 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.

Oldfield Mouse in Florida, by the numbers

Occasional in Florida 75th most recorded of 116 mammals logged in Florida

3,169 occurrence records
18 with iNaturalist photos
Mar 8, 2026 Last seen in Florida

3,169 total records count every Florida occurrence from GBIF and iNaturalist; the map plots a georeferenced sample of 300; the monthly chart covers the 2,828 records with a full observation date.

When to look for the Oldfield Mouse in Florida

Most sightings fall in May.

2,828 Florida occurrence records (iNaturalist and GBIF) by month of year. Shows when the species is recorded, not a guarantee of presence.

Monthly Florida records (table)
MonthRecords
January561
February275
March237
April171
May612
June94
July137
August98
September333
October30
November187
December93

Monthly oldfield mouse occurrence records (iNaturalist and GBIF) in Florida.

Seasonality

Year-round in Florida, with recorded sightings peaking in May, with a smaller rise in January.

Occurrence map

Where Oldfield Mouse has been recorded in Florida

300 records mapped · zoom and drag to explore

300 Florida records mapped

Notable places to look

Park, forest, or monumentiNaturalist records
Gulf Islands National Seashore 174
Anastasia State Park 55
Ordway-Swisher Biological Station 16
Paynes Prairie Preserve State Park 11
Grayton Beach State Park 2
Fort Matanzas National Monument 2
Sebastian Inlet State Park 2
Three Lakes Wildlife Management Area 1

Protected places with the most oldfield 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
Marion County 395
Okaloosa County 388
Walton County 284
Santa Rosa County 222
St. Johns County 197
Jackson County 177
Highlands County 167
Brevard County 166
Alachua County 152
Washington County 131
Escambia County 122
Gulf County 106
31 other counties 662

The complete county distribution, spread across 43 Florida counties. Every occurrence record falls in one county, so these sum to the total. Counties from GBIF and US Census boundaries.

Subspecies in Florida

Several pale beach mouse subspecies occur only on particular stretches of Florida’s coastal dunes and are federally protected.

Florida’s 3,169 oldfield mouse records come almost entirely from GBIF, with just 18 from iNaturalist, so this is large-scale survey data rather than casual sightings. Several pale beach mouse subspecies exist only on specific stretches of Florida’s coastal dunes and carry federal protection, though the records here cover the species as a whole.

May is the clear peak month, with 612 records compared to a few hundred or fewer in most other months. Gulf Islands National Seashore appears among the named sites, but with so few records tied to any single place, it reads as one data point rather than a hotspot.

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: