Plant, Bird, Animal, Birch, Tree Trunk, Mammal, Accipiter, adult, alive, animal, background, bark, biodiversity, biology, bird, birding, birdwatching, black, branch, cacity, conservation, day, dipping, ecology, environment, environmental, fauna, feathers, gray, grey, head, life, limb, living, natural, nature, organism, ornithology, outdoors, outside, red, red-headed, resting, scene, scenery, scenic, science, tree, trunk, vertebrate, vertical, warm-blooded, wild, wilderness, wildlife, wing, zoology, outdoor, plant, achiever, skill, discipline, twenty-four hours, dissimilarity, direction, life science, improvement, woody plant, crimson, feather, heterogeneity, transformation, division, grownup, disfavor, difference, nonuniformity, rejection, diverseness, experience, person, situation
Redheaded woodpecker (Melanerpes erythrocephalus) dipping its head into a nesting cavity