Ключевые слова: animal, animals, beak, belgium, biology, bird, birds, branch, brown, bush, cry, europe, european, fauna, feather, feathers, gray, green, hedgerow, male, males, natural, nature, ornithology, paint, perching, prick, river, sing, small, song, songbird, spring, tail, tree, twig, warbler, whitethroat, wild, wildlife,