Post 00131
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The rosy finch, the brown-capped leucosticte of the Rockies (in the Sierra it is the gray-crowned), is a little larger than a junco and is one of the bravest and most trusting of the winged mountaineers. It is the most numerous of the resident bird-population. These cheery little bits live in the mountain snows, rarely descending below timber-line. Occasionally they nest as high as thirteen thousand five hundred feet.
The largest bird resident of the snowy heights is the ptarmigan. Rarely does this bird descend below the timber-line. But a late and prolonged winter storm may drive him and his neighbor the rosy finch a mile or so down the slopes. The first fine day he is back again to the happy heights. The ptarmigan lives in the heathery growths among huge rocky débris. Much of the winter-time he shelters himself in deeply penetrating holes or runs in the compacted snow. His food consists of the seeds and buds of alpine plants, grasses, and insects. His ways remind one of a grouse, though he is a smaller bird. During winter he appears in suit of white, stockings and all. In spring a few black and cinnamon-colored feathers are added, and by midsummer his dress is grayish-brown. During all seasons he is fairly well concealed from enemies by the protective coloration of his clothes, and he depends largely upon this for protection. He is preyed upon by the weasel, fox, bear, eagle, and lion.
Although the mountain-tops have only a few resident birds, they have numerous summer bird builders and sojourners. Many birds nest in these heights instead of going to similar conditions in the great Arctic Circle nursery. Thus most birds met with in the heights during the summer season are the migratory ones. Among the summer residents are the American pipit, the white-crowned sparrow, and the gray-headed junco, the latter occasionally raising two broods in a summer. Here, too, in autumn come flocks of robins and other birds for late berries before starting southward.