. Birds of Yellowstone and Grand Teton National Parks . Birds; Birds. Spotted Sandpiper Bruce Pitcher CALIFORNIA GULL (Larus californicus) The California gull is an opportunist that allows few sources of food to escape its notice. In Yellowstone and Grand Teton, as elsewhere, this species follows the fisherman, feeding on discarded fish and fish entrails. However, fish are but one item in a varied diet which includes mice, a variety of insects, and where available, edible parts of garbage. The adult California gull has a gray mantle with black wing tips, greenish legs, and a yellow bill with a
. Birds of Yellowstone and Grand Teton National Parks . Birds; Birds. Spotted Sandpiper Bruce Pitcher CALIFORNIA GULL (Larus californicus) The California gull is an opportunist that allows few sources of food to escape its notice. In Yellowstone and Grand Teton, as elsewhere, this species follows the fisherman, feeding on discarded fish and fish entrails. However, fish are but one item in a varied diet which includes mice, a variety of insects, and where available, edible parts of garbage. The adult California gull has a gray mantle with black wing tips, greenish legs, and a yellow bill with a red or red and black spot. The plumage of immature gulls reflects their age and sexual development. First-year gulls are mottled, dusky brown with flesh-colored bills, while second-year birds are pale gray. California gulls are common on larger lakes and rivers in both Yel- lowstone and Grand 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. [United States] : Yellowstone Library and Museum Association in cooperation with National Park Service, U. S. Dept. of Interior
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