Playful semi-aquatic carnivores that act as indicator species for clean water — their presence signals a healthy aquatic ecosystem.
§ Quick facts
§ Encyclopedia
The North American river otter, also known as the northern river otter and river otter, is a semiaquatic mammal that is endemic to the North American continent throughout most of Canada and along the coasts of the United States and its inland waterways. An adult North American river otter can weigh between 5 and 14 kilograms (11–31 lb). The river otter is protected and insulated by a thick, water-repellent coat of fur.
Source: Wikipedia — North American river otter Licensed under CC BY-SA 4.0
§ Identification
Field marks. Long sleek brown body with paler throat; thick muscular tail; webbed feet.
Similar species. American Mink (much smaller). Sea Otter (lives in marine waters, floats belly-up).
Voice. Whistles, chirps, growls, hisses.
§ Diet & behavior
Diet. Fish (primary), amphibians, crustaceans, occasionally small mammals or birds.
Behavior. Highly playful — slides down mud or snow banks. Lives in family groups. Excellent swimmer; can hold breath 8+ minutes.
§ Range
Throughout North America wherever clean waterways exist
§ Habitat
Rivers, streams, lakes, marshes, and coastal estuaries
§ Threats
Water pollution, habitat fragmentation, illegal trapping in some regions.
§ Conservation status
According to the IUCN Red List, the north american river otter is currently classified as Least Concern.
§ What helps
Reduce runoff pollution. Support watershed restoration. Avoid disturbing river banks during nesting.
§ Further reading
- Wikipedia — North American river otter
- www.nwf.org — authoritative profile of Lontra canadensis
- IUCN Red List · taxon 12302
- iNaturalist · taxon 41769
- GBIF occurrence records
- Encyclopedia of Life — Lontra canadensis
§ Sources cited
- NWF Wildlife Guide
- River Otter Alliance
- National Park Service
- IUCN Red List 2014
