The food of these birds is abundant in quantity, and though simple, yet partakes of an extensive assortment of flavours. Twigs of the fine-leaved heath (_Erica cinerea_), and heather (_Calluna_); buds of the willow and birch; the tender shoots of cotton-grass, sedge, and grass; and whortleberries, cranberries, and crowberries, are the principal items of their bill of fare, varied according to the season. In the months of February, March and April, they do much mischief to plantations by destroying the tender shoots of Scotch and Silver Fir. 'In searching for food, the Black Grouse frequents the lower grounds of the less-cultivated districts, not generally removing far from the shelter of woods or thickets, to which it betakes itself as occasion requires. It sometimes makes an excursion into the stubble-fields in search of the seeds of cereal plants, and in summer and autumn includes those of the grasses and rushes. While thus employed, it walks and runs among the herbage with considerable agility, and, when apprehensive of danger, flies off to a sheltered place, or settles down and remains motionless until the intruder passes by. It perches adroitly, and walks securely on the branches; but its ordinary station is on the ground, where also it reposes at night. It may often, especially in spring, be seen on the turf-top of the low walls inclosing plantations. Its flight is heavy, direct, and of moderate velocity, and is capable of being protracted to a great distance.'[41]
The Grey Hen constructs a rude nest of withered grass and a few twigs in the shelter of some low bush, and lays from five to ten eggs. The male bird takes no part in the bringing up of the brood, but leaves the duties of incubation and attention to the wants of his family to the hen, who devotes herself wholly to the careful nurture of her little ones. While the poults are in their nonage, she assiduously leads them about where food is most abundant; and if surprised by an intruder, leaves them to hide among the heath and ferns, creeps rapidly herself to some distance, and then rises in a fluttering manner, so that a stranger to her habits would suppose her to be wounded. By August 20, the young are supposed to be fully fledged, and the sportsman is expected not only to show his skill as a marksman, but his quickness of eye in discriminating between males and females as the covey rises. The former are to be distinguished by their richer colouring, and by the more strongly marked white on the wings. At this season the old Black Cocks club together.