Ptarmigans pair early in spring, and build their nest of grass, bents and twigs in a slight hollow behind a stone or bush, and lay from seven to twelve eggs. The young are able to run about as soon as they are hatched, and, as we have seen, are most expert and nimble in concealing themselves. The hen bird when surprised with her young brood counterfeits lameness, and runs about in great anxiety, as if wishing to draw attention from her chicks to herself. Their food consists of the fresh green twigs of heath and other mountain plants, seeds, and berries. While feeding they run about, and are shy in taking flight even when they have acquired the use of their wings, but crouch on the approach of danger, and remain motionless and silent. When at length they do rise, they fly off in a loose party, and mostly in a direct line, for a distant part of the mountain, the movement of their wings resembling that of the Grouse, but being lighter in character. Early in the season, a long time before Grouse, the coveys of Ptarmigans unite and form large packs, and it is while thus congregated that they perform their partial migrations from the high grounds to what they consider a milder climate, the Norwegian valleys. There, while the ground is covered thickly with snow, they, to a certain extent, modify their habits, and perch on trees, sometimes in such numbers that the branches seem to be altogether clothed in white. It does not appear that any of these flocks make long journeys or cross the sea. In Scotland they are no more numerous in winter than in summer, nor have they been observed to take refuge in the woods. In the comparatively mild temperature of Scotland there occurs no lengthened period during which they cannot find their simple food somewhere in the open country; they consequently do not leave the moors, but only descend lower.
The Ptarmigan is neither so abundant nor so generally diffused in Scotland as the Grouse. It is resident on high mountains. It is said to have existed at one time in the north of England and in Wales; if so, it has totally disappeared, nor is it known in Ireland.
[42] Rev. A. C. Smith, in the _Zoologist_, vol. viii. p. 2977.
Head and neck glossy, with metallic reflections of green, blue, and purple; sides of the head bare, scarlet, minutely speckled with black; general plumage spotted and banded with orange-red, purple, brown, yellow, green, and black, either positive or reflected; tail very long, of eighteen feathers, the middle ones longest. _Female_--light brown, marked with dusky; sides of the head feathered; tail much shorter. Length three feet. Eggs olive-brown.