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An adult North American river otter can weigh between 5.0 and 14 kg (11.0 and 30.9 lb). Unfortunately, even though the species has made a distinct comeback and is now found often in our rivers, wild otters rarely live beyond 4 years of age. River otters primarily feed on fish with the size ranges from 2 – 50 cm (0.79 – 20 inches) which is really necessary since fish is a great source for gaining calories. They swim using their webbed paws as flippers, and for added speed they will undulate the torso like a dolphin. The giant otter averages 145 to 180 cm (57-71 in. These include game fishes, bass (Centrarchidae) suckers (Catostomidae), and shiners. Giant Otter This South American otter is the world's largest, at some 6 feet long. The river otter is Minnesota's largest aquatic carnivore that lives in most northern Minnesota lakes, ponds, and streams. It can swim and maneuver better than many fish, and swims with only the top of its head out of the water. and 3 to 14 kg (7-31 lbs.). Fish are a favorite food, but they also eat amphibians, turtles, and crayfish. The smallest river otter is the marine otter, averaging 87 to 115 cm (34-45 in.). The largest river otter is the North American river otter, ranging from 100 to 153 cm (39-60 in.). Reports now state that otters inhabit every county in the UK – great news for the otter! River otters range in size from about 87 to 153 cm (34-60 in.) On land they use a rolling gait like a horses canter, or hop-like movements. River otters, members of the weasel family, hunt at night and feed on whatever might be available. The oldest recorded otter reached around 12 years of age, but this is exceptional. The North American river otter (Lontra canadensis) is a semiaquatic mammal in the weasel family.While it may simply be called the "river otter" in North America (to distinguish it from the sea otter) there are other river otter species throughout the world. After an absence of more than a century, its range is … The river otter is agile in water and on land, in fact there are two different names for a group of otters - a raft of otters if they are in the water, and a romp of otters if they are on land.
The river otter is protected and insulated by a thick, water-repellent coat of fur. The North American river otter (Lontra canadensis), also known as the northern river otter or common otter, is a semiaquatic mammal endemic to the North American continent found in and along its waterways and coasts.
It lives only in the rivers and creeks of the Amazon, Orinoco, and La Plata river systems. Despite its common name, the North American river otter is equally comfortable in either coastal marine or freshwater habitats.
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