Cassell's book of birds; vol. 3

by Alfred Edmund Brehm

PALLAS'S SAND GROUSE, OR SAND GROUSE OF THE STEPPES.

These birds are met with throughout the whole of Europe, Asia, and North America, but are quite unknown in Africa. All are, without exception, stationary in their habits, and rarely undertake expeditions to any great distance from their native haunts. During the period of incubation they live alone or in pairs, but at other times in parties, which often unite into large flocks. Their food consists of fruits, seeds, the young shoots of plants and trees, insects, and larvæ. Some species are polygamous, but many pair; in the latter case, at least, both males and females assist in rearing the young. Although by no means highly endowed, the Tetraones have their sense of sight and hearing well developed. They walk quickly, but fly heavily, and with much noise, resorting but rarely to this means of progression, and never rising to any height in the air. The increase of these birds is very rapid, the female laying from eight to sixteen eggs, oval in shape, smooth, yellowish, and spotted with brown. No actual nest is prepared for their reception, a slight hollow in the earth, carelessly lined with some soft material, being all that is required for the purpose, provided that the situation is sufficiently retired to secure the safety of the young. We are told by several Swedish naturalists that not only are these birds subject, like their congeners, to many changes of plumage, but that they cast their claws, and at the same time the horny fringes with which their toes are defended.

THE CAPERCALI.

The CAPERCAILLIE, CAPERCAILZIE, or CAPERCALI (Tetrao urogallus), the largest and finest species of the above group, is of a blackish hue on the crown of the head and throat; the nape is deep grey, marked with undulating black lines; the back pale black, powdered with grey and reddish brown; the tail black, spotted here and there with white; the breast glossy steel-green, and the rest of the under side spotted more or less distinctly with black and white. The eye is brown, the bare skin that surrounds it bright red, and the beak greyish white. This noble bird is from two feet two inches to two feet five inches long, its breadth being from four feet four inches to four feet seven inches; the wing measures from fifteen to seventeen, and the tail from thirteen to fourteen inches.

"The Capercali," says Mr. Lloyd, "is to be found in most parts of the Scandinavian peninsula; indeed, as far to the north as the pine-tree flourishes, that is to say, very near to the North Cape itself. These birds are, however, very scarce in the more southern of the Swedish provinces. The favourite haunts of the Capercali are extensive fir-woods. In coppices or small covers they are seldom or never to be found." Professor Nilsson observes that such as breed in the larger forests remain there all the year round, but those on the contrary that breed on the sides of elevated mountains, or in more open parts of the country, in the event of deep snow, usually descend to the lower grounds.

The principal food of the Capercali, when in a state of nature, consists of the leaves and tender shoots of the Scotch fir (Pinus sylvestris). He very rarely feeds upon those of the spruce (Pinus abies). He also eats juniper-berries, blue berries, and other berries common to the northern forests, and also, occasionally in the winter time, the buds of the birch, &c. The young Capercali feed principally at first on ants, worms, and insects.

In the spring of the year, and often when the ground is still deeply covered with snow, the cock stations himself on a pine, and commences his love song, or play, as it is termed in Sweden, to attract the hens about him. This performance is usually carried on from the first dawn of day to sunrise, or from a little after sunset, until darkness has set in. The time, however, more or less depends upon the mildness of the weather, and the advanced state of the season. During his play the neck of the Capercali is stretched out, his tail is raised and spread like a fan, his wings droop, his feathers are ruffled up, and, in short, he much resembles in appearance an angry Turkey-cock. He begins his play with a call, something resembling the words "Peller, peller, peller." These sounds he repeats at first at some little intervals; but, as he proceeds, they increase in rapidity, until at the last, and after perhaps the lapse of a minute or so, he makes a sort of gulp in his throat, and finishes by drawing in his breath. During the continuance of this latter process, which only lasts a few seconds, the head of the Capercali is thrown up, his eyes are partially closed, and his whole appearance would denote that he is worked up into an agony of passion.

"On hearing the call of the cock, the hens, whose cry in some degree resembles the croak of the Raven, or rather, perhaps, the sound of 'gock, gock, gock,' assemble from all parts of the surrounding forest. The male bird now descends from the eminence on which he was perched to the ground, where he and his female friends join company.

"The Capercali does not play indiscriminately over the forest, but has certain stations, which may be called his playing grounds. These, however, are often of some little extent; and here, unless very much persecuted, the call of these birds may be heard in the spring, year after year, for years together. The Capercali does not during his play confine himself to any particular tree, and is seldom met with on the same spot for two days in succession. On these playing grounds several Capercali may occasionally be heard playing at the same time. Old male birds will not permit young birds, or those of the preceding season, to play. Should the old birds, however, be killed, the young ones, in the course of a day or two, usually open their pipes. Combats, as may be supposed, not unfrequently take place on these occasions, though I do not recollect having heard of more than two of these birds being engaged at the same time."

"The Capercali hen makes her nest upon the ground, and lays from six to twelve eggs; these are two inches three lines long, by one inch eight lines in breadth, and of a pale reddish yellow-brown, spotted all over with two shades of darker orange-brown. It is said she sits for four weeks; her young keep with her until the approach of winter, but the cocks separate from the mother before the hens. When the females really commence incubation, they are forsaken by the old males, who skulk about among the brushwood while renewing their plumage, the female alone attending to the hatching and rearing of her progeny."