Ключевые слова: animal, animals, avian, background, beak, beautiful, bird, birds, branch, brown, canada, canadian, cup nest, environment, environmental conservation, feather, flight, forest, gilvus, gray, green, horizontal, leaves, living organism, natural, nature, nest, north america, ontario, organism, ornithology, outdoors, outside, passeriformes, passerine, perching, song, songbird, toronto, tree, twig, vireo, vireo gilvus, vireonidae, warbling, warbling vireo, watching, wild, wildlife, wing,