Not to be confused with the much larger Sea Otter, River Otters as the name suggests can be found mostly in rivers, streams, lakes and estuaries. Like American Olympian Michael Phelps, Otters are built for swimming with a streamlined body, short legs with webbed feet, dense fur and nostrils that close underwater (Phelps luckily does not share these physical characteristics).
While you could catch a glimpse of an Otter in a lot of coastal areas of the US, Snake River in Jackson, Wyoming is one of the best places for a spot of Otter spotting.
Fun Fact: While smaller than Sea Otters, River Otters can still weigh up to 14 kilograms which is as much as some toddlers!