Animal, Accipiter, Anthus, Buzzard, Hawk, Sparrow, alive, animal, background, beautiful, beauty, biodiversity, biology, branch, climate, conservation, cool, day, ecology, environment, environmental, fauna, feathers, green, growth, hopping, horizontal, jumping, kinglet, life, limb, living, natural, nature, olive, organism, ornithology, outdoors, outside, passerine, ruby-throated, scene, scenery, science, small, songbird, tiny, vegetation, vertebrate, warm-blooded, white, wild, wilderness, wildlife, wings, zoology, outdoor, diminutive, achiever, warbler, skill, sport, discipline, twenty-four hours, mood, composure, implementation, nonuniformity, means, direction, life science, improvement, aplomb, feather, heterogeneity, bird, development, division, diversion, fruit, disposition, disfavor, bantam, difference, dissimilarity, oscine, rejection, diverseness, plant part, experience, transformation, person, track and field, growing, situation