Ключевые слова: activities, activity, animal, animals, aqua, avain, aves, beast, bird, birds, concept, concepts, conceptual, couple, creature, creatures, ecology, ecosystem, emotion, emotional, emotions, environment, environmentalism, fauna, feather, feeling, feelings, fowl, graceful, moisture, nature, pair, peaceful, river, scenery, scenic, swan, swans, swim, swimming, two, undomesticated animals, water, water bird, water fowl, waterbird, waterfowl, wildlife, zoology,