Animal, Tarmac, Asphalt, Sparrow, Anthus, Finch, Road, Ground, alive, animal, avian, background, beak, bill, biodiversity, biology, bird, birding, birdwatching, brown-headed, cement, concepts, conceptual, concrete, conservation, cowbird, day, ecology, environment, environmental, fauna, feathers, ground, horizontal, life, living, looking, male, nature, one, organism, ornithology, outdoors, outside, paved, pavement, scene, scenery, scenic, science, single, small, vertebrate, warm-blooded, wild, wildlife, wing, zoology, sensory activity, outdoor, new world oriole, walk, sidewalk, earth, skill, passage, discipline, dissimilarity, direction, life science, improvement, 1, unity, feather, heterogeneity, twenty-four hours, passerine, looking at, mouth, paving, path, difference, nonuniformity, transformation, look, orifice, land, conception, ace, diverseness, building material, oscine, experience, new world blackbird, writing, situation, sensing, document
Single male brown-headed cowbird (Molothrus ater) looking toward the camera