Maine mammals

White-footed Mouse in Maine

Peromyscus leucopus

Native to Maine S5 Secure in Maine

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

White-footed Mouse in Maine, by the numbers

Occasional in Maine 32nd most recorded of 85 mammals logged in Maine

407 occurrence records
67 with iNaturalist photos
Oct 22, 2025 Last seen in Maine

407 total records count every Maine occurrence from GBIF and iNaturalist; the map plots a georeferenced sample of 300; the monthly chart covers the 389 records with a full observation date.

When to look for the White-footed Mouse in Maine

Most sightings fall in August.

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

Monthly Maine records (table)
MonthRecords
January17
February14
March27
April14
May20
June39
July69
August116
September29
October17
November14
December13

Monthly white-footed mouse occurrence records (iNaturalist and GBIF) in Maine.

Seasonality

Year-round in Maine, with recorded sightings peaking in August.

Occurrence map

Where White-footed Mouse has been recorded in Maine

300 records mapped · zoom and drag to explore

300 Maine records mapped

Notable places to look

Park, forest, or monumentiNaturalist records
Acadia National Park 44
Massabesic Experimental Forest 2
Holbrook Island Sanctuary State Park 1
Camden Hills 1
Dwight B. Demeret Forest 1

Protected places with the most white-footed 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 Maine

CountyRecords
Penobscot County 128
Cumberland County 88
Hancock County 58
Sagadahoc County 36
York County 21
Oxford County 12
Franklin County 11
Kennebec County 9
Androscoggin County 9
Waldo County 5
Lincoln County 5
Somerset County 3
2 other counties 22

The complete county distribution, spread across 14 Maine counties. Every occurrence record falls in one county, so these sum to the total. Counties from GBIF and US Census boundaries.

The white-footed mouse turns up in 407 Maine records, a middling count for a woodland mouse that’s genuinely widespread across the state’s forest edges but easy to overlook against its close relative, the deer mouse.

Edges and brush piles, not deep canopy

White-footed mice favor forest edges, stone walls, brush piles, and shrubby understory rather than continuous, unbroken canopy. That habitat preference fits neatly with the range of habitats behind Maine’s records, from Acadia’s mixed coastal woods to the cleared and semi-open ground around Baxter State Park, rather than the deepest, most closed stretches of the North Woods interior.

An August surge tied to a summer of breeding

Records spike hard in August, more than double the count of any surrounding month. That timing lines up with the mouse’s breeding calendar: females raise multiple litters over the warm season, and by late summer a wave of newly independent young disperses in search of its own territory, putting far more mice above ground at once than earlier in the year.

Status in Maine

NatureServe ranks the white-footed mouse S5 in Maine, secure, and it’s native across the state. It shares much of its Maine range with the closely related deer mouse, and the two are difficult to tell apart without a close look at the tail and ears, so some records logged as one species may genuinely belong to the other.

Occurrence data from iNaturalist and GBIF.

More mammals in Maine 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"