Connecticut mammals

Fisher in Connecticut

Pekania pennanti

Native to Connecticut S2 Imperiled in Connecticut

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

IUCN Red List status

NE – Not Evaluated

Not yet assessed against IUCN Red List criteria.

Fisher in Connecticut, by the numbers

Occasional in Connecticut 31st most recorded of 70 mammals logged in Connecticut

47 occurrence records
40 with iNaturalist photos
Mar 6, 2026 Last seen in Connecticut

Records from 2000–2026.

47 total records count every Connecticut occurrence from GBIF and iNaturalist; the map plots a georeferenced sample of 45; the monthly chart covers the 45 records with a full observation date.

When to look for the Fisher in Connecticut

Most sightings fall in February.

45 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
February15
March6
April2
May2
June4
July1
August3
September0
October2
November3
December1

Monthly fisher occurrence records (iNaturalist and GBIF) in Connecticut, 2000–2026.

Seasonality

Year-round in Connecticut, with recorded sightings peaking in February.

Occurrence map

Where Fisher has been recorded in Connecticut

45 records mapped · zoom and drag to explore

43 Connecticut records mapped

Where it's recorded in Connecticut

CountyRecords
Tolland County 12
New Haven County 7
Middlesex County 6
Windham County 5
Litchfield County 4
Hartford County 3
New London County 3
Fairfield County 1
Other localities 6

The complete county distribution, spread across 8 Connecticut counties. Every occurrence record falls in one county, so these sum to the total. Counties from GBIF and US Census boundaries.

Fishers are large members of the weasel family and one of the few predators known to regularly kill porcupines, flipping them onto their backs to reach the unprotected belly. NatureServe ranks the species S2, imperiled, in Connecticut, reflecting a population that’s still working its way back after being trapped out of southern New England by the early 1900s and only returning as forest cover regrew across the state’s inland hills.

Records peak sharply in February, more than seven times the September low, and vanish almost completely from July through October, a pattern that likely tracks winter breeding activity and easier tracking in snow rather than any true summer absence. Hammonasset, Bluff Point, and Barn Island mark the state’s default coastal reference points, though a forest-dependent predator like the fisher is more likely to turn up in Connecticut’s inland woodlands than along the immediate shoreline.

Occurrence data from iNaturalist and GBIF.

Fisher in other 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
  • NatureServe ExplorerCC-BYthe state conservation rank
  • IUCN Red Listattributed factthe global conservation status
  • USGS NASpublic domainnative / introduced status
  • Natural Earthpublic domainthe relief basemap