About river otters
Body length: 38 to 47 inches (head to tail).
Height: 7 to 10 inches.
Weight: 15 to 20 pounds.
Life expectancy: 10 to 15 years.
Migration: Year-round residents, but young might travel 10 to 20 miles to establish own territories.
Feeding time: At night or twilight.
Diet: Fish, aquatic insects, crayfish, snakes and, to lesser degree, waterfowl and mammals.
Peak breeding: March to April.
Litter size: Two or three pups. Young are born in February, March or April.
— Source: Ohio Department of Natural Resources Division of Wildlife