a solitary beaver intently gnawing on a stick in the shallows near a riverbank

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