. Birds of Yellowstone and Grand Teton National Parks. Birds; Birds. GREAT HORNED OWL (Bubo virginianus) The great horned owl is the only large North American owl with ear tufts or horns. It also has a finely barred stomach and a conspicuous white throat. Great horned owls inhabit cliffs and canyons and broken forest habitats in both parks. Their prey includes grouse, squirrels, hares and marmots, as well as small rodents and birds. Unlike most birds, owls have binocular vision. The eyeball of this owl is as large as the eye of a human, but tubular in shape. The enlarged lens-cornea portion of
. Birds of Yellowstone and Grand Teton National Parks. Birds; Birds. GREAT HORNED OWL (Bubo virginianus) The great horned owl is the only large North American owl with ear tufts or horns. It also has a finely barred stomach and a conspicuous white throat. Great horned owls inhabit cliffs and canyons and broken forest habitats in both parks. Their prey includes grouse, squirrels, hares and marmots, as well as small rodents and birds. Unlike most birds, owls have binocular vision. The eyeball of this owl is as large as the eye of a human, but tubular in shape. The enlarged lens-cornea portion of the eye allows it to gather and concentrate all available light. Great horned owls also have ears of unequal size which aid them in locating prey. The flight fea- thers of the owl's wings have finely-toothed edges which allow the bird to fly almost noiselessly. With these special adaptations, the great horned owl is truly a marvelous Great Horned Owl Alan 36. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Follett, Dick; Yellowstone Library and Museum Association; United States. National Park Service. [Yellowstone National Park] : Yellowstone Library and Museum Association, in cooperation with National Park Service, U. S. Dept. of Interior
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