Ключевые слова: animal, background, beaver, biology, black, bone, braincase, brown, castor, castor fiber, chordata, closeup, dam, eating, environment, eurasian, eurasian beaver, europe, european, european beaver, feeding, fiber, fragile, head, isolated, isolation, lake, mammal, nature, norway, os, outdoor, pond, portrait, research, river, rodent, rodentia, rostrum, science, scientific, skeleton, skull, specimen, study, teeth, tooth, water, wild, wildlife,