Beaver in river with keen sense of smell sniffs air and dives down into water

beaver river castor fiber keen sense of smell aquatic habitat swedish wildlife wildlife observation semiaquatic large rodent european beaver eurasian beaver swim wildlife fauna swedish nature nature leisurely halfsubmerged pond rodent water aquatic swimming beaver freshwater herbivore dam natural habitat rodentia castoridae herbivorous castor animal wild wet fur ecology outdoors environment no people nobody horizontal float sniff dive down looking at camera facing camera strong sense of smell smell