Massachusetts mammals

American Red Squirrel in Massachusetts

Tamiasciurus hudsonicus

Native to Massachusetts S5 Secure in Massachusetts

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

American Red Squirrel in Massachusetts, by the numbers

Common in Massachusetts 9th most recorded of 93 mammals logged in Massachusetts

2,699 occurrence records
2,433 with iNaturalist photos
Jul 11, 2026 Last seen in Massachusetts

2,699 total records count every Massachusetts occurrence from GBIF and iNaturalist; the map plots a georeferenced sample of 300; the monthly chart covers the 2,633 records with a full observation date.

When to look for the American Red Squirrel in Massachusetts

Most sightings fall in April to June.

2,633 Massachusetts occurrence records (iNaturalist and GBIF) by month of year. Shows when the species is recorded, not a guarantee of presence.

Monthly Massachusetts records (table)
MonthRecords
January115
February113
March216
April423
May336
June359
July205
August175
September191
October200
November176
December124

Monthly american red squirrel occurrence records (iNaturalist and GBIF) in Massachusetts.

Seasonality

Year-round in Massachusetts, with recorded sightings peaking in April–June.

Occurrence map

Where American Red Squirrel has been recorded in Massachusetts

300 records mapped · zoom and drag to explore

300 Massachusetts records mapped

Notable places to look

Park, forest, or monumentiNaturalist records
Cape Cod National Seashore 132
Nickerson State Park 7
Burrage Pond Wildlife Management Area 5
J. C. Phillips Sanctuary 5
Minute Man National Historical Park 4
Westborough Wildlife Management Area 4
Red Brook Wildlife Management Area 3
Breakheart Reservation 3

Protected places with the most american red squirrel 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 Massachusetts

CountyRecords
Middlesex County 680
Worcester County 390
Essex County 355
Plymouth County 315
Barnstable County 281
Norfolk County 234
Hampshire County 129
Bristol County 118
Franklin County 74
Berkshire County 57
Hampden County 37
Suffolk County 13
Other localities 16

The complete county distribution, spread across 12 Massachusetts counties. Every occurrence record falls in one county, so these sum to the total. Counties from GBIF and US Census boundaries.

Red squirrels are among the more frequently logged mammals in Massachusetts, with nearly 2,700 records and a rank near the top of the state’s mammal list. That volume says less about total numbers than about how loud and easy to notice the species is wherever conifers grow.

A conifer specialist in a mostly hardwood state

Most of Massachusetts is hardwood forest, so red squirrel records concentrate wherever spruce, fir, hemlock, or pine stands break up that pattern, especially the higher, cooler slopes of Mount Greylock and the Berkshires and the scattered conifer stands across the north-central highlands. The species is far less reported from the hardwood-dominated coastal plain and the Boston Basin, where its preferred cone crop is thin on the ground.

A squirrel that stakes out its cone pile

A red squirrel spends the fall gathering conifer cones into a single central cache, called a midden, then defends that pile fiercely through the winter with a rapid, chattering call that’s often the first sign one is nearby. That territorial habit means a single conifer stand can hold a dense cluster of squirrels while the hardwoods just beyond stay empty of them.

A spring surge in the records

Reports jump sharply in April and stay high through early summer, tracking the spring breeding chases that make red squirrels far noisier and more visible than they are during the quieter months of late fall and winter.

Status in Massachusetts

NatureServe ranks the red squirrel S5, secure, and it’s native to the state. Its numbers track the health and extent of the state’s conifer stands more closely than they track the forest as a whole, since hardwood acreage alone doesn’t do much for a squirrel that needs a steady cone crop to get through winter.

Occurrence data from iNaturalist and GBIF.

American Red Squirrel in other states

View all states →

More mammals in Massachusetts 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"