Beavers can look like river otters, and have been seen in the Paddleboat Quarry in Naperville and the nearby DuPage River. And what she and her husband and two sons, ages 3 and 5, saw was a beaver ...

River otters, nearly wiped out through trapping, habitat destruction and poor water quality in the 1900s, were a rarity until a re-introduction program brought them back to Illinois. Now, some are … ...

A beaver dam in an area creates pools where fish can be found an increases the chance of observing an otter. An otter den typically has a number of tunnels and openings Fossil records of river otters ...

The Ohio Department of Natural Resources said that river otters were seen in the Triangle Lake Bog State Nature Preserve in Portage County last week.

While river otters were once on the state's threatened species list, they've now rebounded enough to have a short trapping season on the east side of the state.

River otters seem to be faring slightly better in the mountains, where they’ve been seen or photographed with remote cameras while fishing in North Boulder Creek, Beaver Reservoir and Brainard Lake.