Animal, Sparrow, Anthus, Finch, Tree, Plant, Wren, alive, animal, background, beak, beauty, bill, biodiversity, biology, bird, birding, birdwatching, bush, Carolina, conservation, day, display, ecology, environment, fauna, feathers, green, greenery, growth, horizontal, leaves, life, living, nature, organism, ornithology, outdoors, outside, scene, scenery, scenic, science, shrub, shrubbery, small, songbird, territorial, vegetation, vertebrate, warm-blooded, wild, wilderness, wildlife, wing, wren, zoology, outdoor, serviceman, show, writing, skill, passage, demonstration, discipline, twenty-four hours, leaf, soldier, dissimilarity, direction, life science, improvement, woody plant, feather, oscine, carolina, development, worker, plant, passerine, mouth, disfavor, difference, nonuniformity, document, orifice, heterogeneity, rejection, diverseness, plant part, skilled worker, experience, transformation, person, foliage, enlisted person, growing, situation
Carolina wren (Thryothorus ludovicianus) with feathers fluffed up in a territorial display in a bush