Beaver swims along calm river next to reeds, static shot framed by tree opening

beaver swim castor fiber aquatic habitat nature river freshwater habitat ecology rodent calm river reeds swedish nature static trees trunk eurasian beaver wildlife large rodent european beaver fauna semiaquatic leisurely halfsubmerged tracking pond water aquatic swimming beaver herbivore dam natural rodentia castoridae herbivorous castor animal wild wet fur outdoors biology environment no people nobody horizontal swedish wildlife