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  3. North American River Otter

One of the 8 otters on WAnimals

North American River Otter (Lontra canadensis)

Mammals · Carnivora · Mustelidae

North American River Otter

Lontra canadensis

Least Concern

The species is abundant and widely distributed; it faces no significant short-term risk.

Spotted something wrong?

It was wiped out across much of its historic range by intensive hunting for its fur, but a great many reintroduction programmes have restored populations in most of its original river basins.

Weight

8 kg – 9 kg

Size

1.3 m on average

Life expectancy

9 years

Diet

Carnivore

Feeds mainly on other animals.

Activity

Irregular activity

Active at irregular times, by day or night depending on circumstances.

Social structure

Solitary

Lives and hunts alone, joining others only to breed.

Freshwater
3countries17parks4dive sites28same family

AI-generated images: illustrations, not photographs.

Fun facts

  • It is a fine swimmer, able to dive for several minutes thanks to special oil glands that waterproof its coat.
  • It eats fish, crayfish and aquatic invertebrates, and occasionally small mammals and birds.
  • It lives in rivers, lakes, wetlands and rocky coasts across much of North America.

Life cycle and biology

Skeleton type
Vertebrate - internal bony skeleton (mammal)
Habitat and environment
Rivers, lakes, wetlands and rocky coasts across much of North America
Birth weight
Born furred but helpless
Size at birth
Born furred but helpless
Sexual maturity
2-3 years
Gestation / incubation
A total gestation of 290-380 days with delayed implantation (only 60-63 days of active embryonic development)
Litter / clutch size
1 to 6 young per litter (most commonly 2-3)
Life expectancy in captivity
Documented record of up to 21-27 years

Sources consulted: Otter Spotter Blog · Animal Diversity Web · AnAge (genomics.senescence.info) · Lafayette Indiana (River Otter) · NPS Yellowstone · BC Conservation Data Centre

Where to find it

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The pins mark the parks and dive sites where its presence is documented.

Where to see it

Parks and dive sites where this species has been documented — showing 14 of 21.

Related species

Other species in the catalogue with the most in common with North American River Otter — same habitat, park, country, tags or family.

Same taxonomic family
Shares a park
Same taxonomic family
Shares a park
Shares a park
Shares a park

Related guides

Keep exploring

Based on what we already know about north american river otter.

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Where to see North American River Otter19 places
CountriesUnited States
ParksYellowstone National ParkUnited States
TagsCarnivore
Carnivore
Variable activity
Solitary
Freshwater
Mammal
United States
Canada
Mexico