Crayfish and frogs are eaten when they're abundant. Less common foods include salamanders, snails, clams, snakes, turtles, birds, and insects. Reproduction Breeding takes place from January through April. The fertilized eggs remain dormant for 285-365 days, then they attach to the wall of the uterus and continue to develop. May. Most litters have 2-4 young.
Newborns are helpless but develop quickly.
Their eyes open at about 35 days of age. Brief trips outside the den begin at 10-12 weeks. Females do most of the work when it comes to raising the pups, but males help occasionally once the pups leave the nest. The young otters are coaxed into the water for the first time at about 14 weeks of age. They're weaned by 4 months of age, but often remain with their mother until the following spring.