Ключевые слова: animal, bark, beaver, biology, bitten, castor, chopped, dam, damage, damaged, danger, destruction, environment, environmental protection, forest, habitat, lake, mammal, marks, marsh, natural environment, nature, nature reserve, outdoors, pest, protected species, river, rodent, season, species, spring, teeth, teethmarks, tree, trunk, wild, wildlie, wildlife, wood, wooden,