Ключевые слова: america, animal, avian, background, barn, biodiversity, biology, bird, birding, brown, close, colorful, conservation, countryside, cute, detail, ecology, ecosystem, environment, environmental, face, feathers, fence, green, hirundinidae, hirundo, map of america, maryland, nature, north, north america, north america map, ornithology, outdoor, passeriformes, passerine, perched, perching, plumage, resting, rustica, sitting, soft, spring, summer, swallow, swallow bird, up, urban, urban wildlife, wild, wild animal, wildlife, zoology,