Pair of American beavers frolic in the shallows chewing on branches of a small tree

pair freshwater beaver shallows frolick branches tree semiaquatic nature wildlife water fur marine aquatic tools chewing sticks gnawing incisors webbed back feet tail animal river lake riverbank wetlands stick no people forage bank building dams herbivorous rodent ecosystem keystone species lodges infrastruture dam american large heads ponds monogamous castoreum canada handlike coat