The playful North American river otter feels at home so much in the water as out of her. He constructs its hearth in a den close to the shore, and can prosper in ecosystems of rivers, lakes, marshes or estuaries. The residences of the otters have numerous tunnels, one of which usually allows them to enter and goes out of the water.
To swim, these otters are promoted by its powerful tails and flexionan its elongated bodies. Also, they have webbed feet and a skin that repels the water to stay dry and warm, as well as nasal orifices and ears that close when they are under the water. They stay active in winter, using of holes in the ice to go out to the surface and to breathe. They can maintain the respiration under the water during approximately eight minutes.
The otters of river, belonging to the family of the weasel, hunt at night and feed of what available beech. The fish are its favorite meal, although also they eat amphibians, turtles and crabs.
In ground, the river otters jump and cover enough good, although his the swimming is. They like to play sliding for covered with snow, frozen or daubed slopes, often with a final dive. Families of otters composed by the mother and the babies amuse themselves this way, what also serves to them to learn survival skills.
The males do not collaborate in the baby of the young otters. The females move back to its underground dens to give birth to litters of between one and six babies. When the babies have only approximately two months of life, they receive an advanced swimming lesson: its mother pushes them to the water. The otters are swimming creams and, with the supervision of its biggest, they learn at once.
The presence of these otters has turned out to be enormously reduced due to the loss of its habitat, although in some places it are so numerous that are hunted. Also, the otters are very sensitive to the environmental contamination.