A sleek, water-loving mammal native to the far south of South America, especially the rainy forests, rivers, and fjords of Chile and parts of Argentina. It has a long, low body that seems made for slipping through water like a shadow, with short legs, fully webbed feet, and a strong tail that works like a rudder. Its fur is dense and velvety, built to trap warmth in cold water, and it often looks dark brown on top with a lighter throat and chest. On land, it can look a bit comical—waddly and low-slung—but the moment it hits the water, it turns into a smooth, fast swimmer that can change direction in a blink.

Unlike some otters that gather in noisy groups, this species is usually more private and cautious. It tends to keep to quiet stretches of shoreline or riverbank, where it can disappear into thick plants, reeds, or rocky crevices. Southern river otters are strong homebodies: they use regular routes, keep favorite resting spots, and often rely on hidden dens that may be tucked among roots, under fallen logs, or inside natural holes along the bank. If you’re lucky enough to see one, it might be just a quick glimpse—an arched back, a whiskered face breaking the surface, then a neat “plop” as it vanishes again. Those whiskers aren’t just for looks, either: they help the otter sense movement in the water, like a built-in underwater “radar” for finding prey.

Food-wise, the southern river otter is a busy hunter with a taste for what the water provides. Fish can be part of the menu, but it also goes after crabs, shrimp-like creatures, and other small animals it can catch along the bottom or among rocks.

Distribution

Country

Population est.

Status

Year

Comments

Argentina

2019

Chile

2019