Definately a Beaver.
Beavers have broad flat tails that they use to splash the water when they're in danger which alert other beavers about it. Otters's tail are rounded.
A bank beaver is a US dialect term for an otter.
With their dams
dams
Well man made dams like the Hoover dam can support the water from overflowing while beaver dams a just basically homes.
beaver
No but a Weasle,Mink is...
because there cool like that
It builds dams
Historical siginifigance
Freshwater Fish and snails, and also Beavers.
the Beaver Environment is usually in streams and thin lakes where they build dams which are theyre homes.