Marine Mammal Science & Conservation

European otter

European otter (Lutra lutra)

Group formation: Solitary territorial, females with 1-4 cubs

Size: 57-95 cm

Weight: 7-12 kg

Age: 16 yrs

Gestation: 60-64 days (non-seasonal breeders)

Sexual maturity: females 2.5 yrs

Diet: large variety of prey species (fish, invertebrates) but learn preferred prey from their mothers.

Distribution: most widely distributed otter species, from parts of Asia and Africa and across Europe.

Norway: common along the coast of Norway

Population: unknown

Conservation Status: Near Threatened ver 3.1, Pop. trend: decreasing

Threats: chemical and plastic pollution, entanglement in fishing gear, over fishing.