THE BLACK GROUSE
Tetrao tetrix, Linnæus
On the moors and woods of Scotland this is a common species, and it is also found locally in a few places in the west of England, but in some of its other English haunts, notably the New Forest, it has died out.
Like the Capercaillie, they are polygamous, and gather together in spring, the cocks fighting and showing off in a variety of evolutions to the hens. Eventually each cock retires with his hens, and breeding commences in earnest. The nest is merely a scrape in the heather or on the outskirts of a wood, and the eggs, generally ten in number, are yellowish, spotted with reddish brown. The young feed chiefly on insects, but when adult, grain, berries, and the tender shoots of many plants constitute their diet. In autumn they visit the harvest-fields in large numbers at daybreak and dusk. The adult male is bluish black all over, with white under tail coverts and a white wing bar. Length 22 in.; wing 10·5 in. The female, usually known as the “Greyhen,” is of a warm brown, barred and marked with black.
THE RED GROUSE
Lagopus scoticus (Latham)
This is the only exclusively British species which is found nowhere else—if we except the local races of many of the smaller birds, which can only be distinguished on a very close examination. Our Grouse differs from the “Ryper” of Norway, which is its nearest ally, by its black primaries, and in the fact that it does not assume a white dress in winter.
RED GROUSE
Lagopus scoticus
Male (left). Female (right)
It inhabits moorlands from the limit of heather growth to the coast-line, and is generally and widely distributed throughout Scotland and the northern half of England, as far south as Glamorganshire in Wales, but on the east it does not occur south of the Trent. In Ireland it is fairly well distributed, but not so common as in Scotland.
Unlike the two former species, the Red Grouse is strictly monogamous, pairing very early in the season, when his call-note of “go back, go back,” may frequently be heard. The nest is a scrape among the heather, no materials being added. Ten to twelve eggs form the usual clutch; they are very handsome, being of a pale ground colour, thickly and profusely marked with dark reddish brown.
The male waits on the hen during incubation, warning her of the approach of danger with a sharp “kok, kok, kok.” Their food consists of various seeds and berries, together with the leaves and shoots of plants, and the tips of ling and heather; in autumn they also visit the harvest-fields.