Kentucky mammals

North American River Otter in Kentucky

Lontra canadensis

Native to Kentucky S3 Vulnerable in Kentucky

Not listed as nonindigenous in Kentucky by USGS NAS; native to its Kentucky 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 River Otter in Kentucky, by the numbers

Common in Kentucky 26th most recorded of 77 mammals logged in Kentucky

116 occurrence records
111 with iNaturalist photos

Records from 2000–2026.

116 total records count every Kentucky occurrence from GBIF and iNaturalist; the map plots a georeferenced sample of 112; the monthly chart covers the 112 records with a full observation date.

When to look for the North American River Otter in Kentucky

Most sightings fall in October to February.

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

Monthly Kentucky records (table)
MonthRecords
January14
February12
March9
April6
May10
June6
July5
August3
September4
October18
November13
December12

Monthly north american river otter occurrence records (iNaturalist and GBIF) in Kentucky, 2000–2026.

Seasonality

Year-round in Kentucky, with recorded sightings peaking in October–February.

Occurrence map

Where North American River Otter has been recorded in Kentucky

112 records mapped · zoom and drag to explore

110 Kentucky records mapped

Where it's recorded in Kentucky

CountyRecords
Trigg County 10
Madison County 10
Lyon County 7
Jefferson County 6
Clark County 6
Spencer County 4
Anderson County 4
Fayette County 4
Bullitt County 4
Marshall County 4
Calloway County 3
Scott County 3
33 other counties 51

The complete county distribution, spread across 45 Kentucky counties. Every occurrence record falls in one county, so these sum to the total. Counties from GBIF and US Census boundaries.

Kentucky’s 116 river otter records look modest beside the state’s deer and squirrel totals, but they document one of its best wildlife recoveries. Otters had largely vanished from the commonwealth by the middle of the twentieth century, and the animals behind today’s map descend from a state reintroduction that released otters at sites across Kentucky between 1991 and 1994.

A swimmer built for fish and cold water

Nearly everything about a river otter is aquatic: a streamlined body, webbed feet, a thick tapered tail for thrust, and fur dense enough to keep it hunting under winter ice. Fish make up most of its diet, with crayfish close behind, and a family group may work miles of shoreline in a single night. Land Between the Lakes, where Trigg and Lyon counties sit between two great reservoirs, holds Kentucky’s strongest cluster of records, with the rivers of Daniel Boone National Forest adding more.

Most visible as the year cools

Counts peak in October and November and stay lively through the winter, a natural rhythm for an animal that never hibernates and often concentrates where open water narrows in the cold. Slides worn down muddy banks and scent-marked logjams give it away even where the otter itself stays out of sight.

Status in Kentucky

NatureServe ranks the river otter S3, Vulnerable, in Kentucky, a rank that reflects a restored but still recovering population. The species is native to the state, and USGS NAS does not list it as nonindigenous here.

Occurrence data from iNaturalist and GBIF.

North American River Otter in other states

View all states →

More mammals in Kentucky 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