River Otter

Lutra Canadensis

Written by Kathy Richards

​The river otter is the largest aquatic member of the mustelid family. Their population has been increasing because of wetland conservation, pollution control and sustainable hunting practices. The increase in beaver population has also created habitats for otters.
image of two river otters Dmitry Azovtsev, via Wikimedia Commons

HABITAT:

​The river otter lives at the edge of streams, rivers, lakes and swamps as well as brackish water. They make their den amongst the roots of large trees, under fallen trees, beneath rock ledges, in hollow logs and in thickets. Otters have been known to use abandoned beaver lodges, muskrat dens (enlarged) or woodchuck burrows.

BEHAVIOR:

​The river otter is mostly nocturnal. It is well known for its slides that go into streams. These slides can be up to 25 feet long in the winter. To keep the loft in the fur the otter will roll in the snow. This helps to keep them warm. Otters have very dense fur with 500 hairs per square inch. The guard hairs (the long ones on top) are dense and oily which keeps the otter warm and dry in cold water.

In the water the otter will mostly paddle with its hind feet and swim by twisting and turning its whole body. They seem to enjoy tumbling, wrestling and chasing each other. Otters do not know how to swim when they are born but are taught by their mother.

It is not unusual to see an otter traveling over land to find better fishing areas.

FOOD:

​They eat fish, frogs, crayfish, turtles, salamanders, snails and rodents.

PREDATORS:

Their main predator is people. Other predators include coyotes, lynx, bobcat, Great Horned Owl (mostly predators of the kits).

Check out other animals in the exhibits nearby

Gray Fox

Fisher

Long Tailed Weasel