Birds of Yellowstone And Grand Teton National Parks
The book Birds of Yellowstone And Grand Teton National Parks was written by author Follett, Dick Here you can read free online of Birds of Yellowstone And Grand Teton National Parks book, rate and share your impressions in comments. If you don't know what to write, just answer the question: Why is Birds of Yellowstone And Grand Teton National Parks a good or bad book?
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Early in the morning, dominant males gather on display grounds where they spread their tails, droop their wings and inflate their yellow throat sacs. When the air is expelled from these sacs they produce a weak vocal sound. Males occupy territories relative to their dominance in the group. The ritualistic courtship serves not only to attract females, but also to reduce injurious fighting. Primarily a brow- ser, the sage grouse feeds on leaves, buds, berries, and small quantities of seeds. Sage ...leaves are a favorite food which comprise nearly 100 percent of the bird's winter diet. Sage grouse are common in sagebrush flats of the Jackson Hole area. 31 Harry Engels AMERICAN COOT (Fulica americana) Coots are plump, slate-gray duck-like birds with scalloped toes. They inhabit the open water of rivers and deep ponds, feeding primarily on submerged vegetation. These noisy, gregarious birds with harsh, grating calls have the curious habit of pumping their heads back and forth as they swim as if to assist in propelling themselves forward.
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