Connecticut mammals

North American Porcupine in Connecticut

Erethizon dorsatus

Native to Connecticut

Not listed as nonindigenous in Connecticut by USGS NAS; treated as native to its mapped Connecticut 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.

North American Porcupine in Connecticut, by the numbers

Common in Connecticut 18th most recorded of 70 mammals logged in Connecticut

162 occurrence records
160 with iNaturalist photos
Jun 25, 2026 Last seen in Connecticut

Records from 2000–2026.

When to look for the North American Porcupine in Connecticut

Most sightings fall in April to June.

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

Monthly Connecticut records (table)
MonthRecords
January6
February10
March5
April24
May35
June23
July12
August8
September16
October16
November6
December1

Monthly north american porcupine occurrence records (iNaturalist and GBIF) in Connecticut, 2000–2026.

Seasonality

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

Occurrence map

Where North American Porcupine has been recorded in Connecticut

162 records mapped · zoom and drag to explore

160 Connecticut records mapped

Notable places to look

Park, forest, or monumentiNaturalist records
Appalachian National Scenic Trail 4
Mohawk State Forest 4
American Legion State Forest 1
Sunny Brook State Park 1
Sessions Woods Wildlife Area 1
Mount Riga State Park Scenic Reserve 1

Protected places with the most north american porcupine 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 Connecticut

CountyRecords
Litchfield County 109
Windham County 23
Hartford County 19
Tolland County 6
Fairfield County 2
Other localities 3

The complete county distribution, spread across 5 Connecticut counties. Every occurrence record falls in one county, so these sum to the total. Counties from GBIF and US Census boundaries.

Connecticut’s porcupine record, 162 records in all, belongs mostly to one corner of the state. Litchfield County accounts for 109 of them, with smaller numbers in Windham and Hartford counties and almost none along the coast, a map that matches the porcupine’s place near the southern edge of its New England range.

An animal of the northwest hills

Porcupines favor forest with rocky ledges for denning and a steady supply of bark, buds, and needles to eat, and Connecticut’s northwestern uplands supply both. Records from Mohawk State Forest, American Legion State Forest, Macedonia Brook State Park, and the Appalachian National Scenic Trail all sit in that hill country. In winter they feed heavily on the inner bark of hemlocks and hardwoods, sometimes staying in a single tree for days, and the gnawed trunks and clipped twigs below are often the first sign that one is overhead.

Slow, but never asleep

Porcupines do not hibernate, though in cold stretches they hole up in ledge dens and keep their foraging trips short. Connecticut’s counts run through the year and rise from April through June, when the animals move more widely for fresh leaves and the previous year’s young, a single porcupette born in spring, set out on their own.

Status in Connecticut

Connecticut does not specifically list the porcupine under its state-level conservation framework, and USGS NAS treats it as native to its mapped Connecticut range rather than a nonindigenous species. Globally, the IUCN lists it as Least Concern.

Occurrence data from iNaturalist and GBIF.

North American Porcupine in other states

View all states →

More mammals in Connecticut 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
  • IUCN Red Listattributed factthe global conservation status
  • USGS NASpublic domainnative / introduced status
  • Natural Earthpublic domainthe relief basemap
  • USGS Protected Areas Databasepublic domainthe named parks, forests, and refuges behind "notable places to look"