These _bulvans_ seem to be very rudely constructed, for if a stuffed Black Cock be not procurable for a _bulvan_, "an imitation one may be made out of an old hat or piece of dark-coloured cloth. Two small patches of red cloth, one on each side of the head, represent the combs over the eyes, and two others of white stuff the white spots on the bird's shoulders. The tail of a veritable Black Cock is usually attached, but should this not be procurable, one made with black cloth, and lined with white, can be substituted in its stead. Legs are not required, the stick to which the _bulvan_ is fastened supplying their place. At times, however, the _bulvan_ is carved out of a piece of wood and afterwards painted." The Black Cock may be domesticated without much trouble, and instances are known of its having bred in captivity. "In the rural districts of Sweden," Mr. Lloyd tells us, "one often sees a caged Black Cock in the houses of the gentry, this bird being greatly admired by every one both for his beauty and for his _spel_, or song, which, though anything but musical, is wild and pleasing, and during the pairing season almost continual." THE HYBRID GROUSE. The HYBRID GROUSE (_Tetrao medius_). In this remarkable bird, a cross between the Black Cock and Capercali, the entire mantle is black, faintly marked with grey spots and zigzag lines; the upper wing is watered with blackish brown and grey; the secondary quills are enlivened by a brown whitish stripe, and edged with the same shade; the slightly-incised tail is black, occasionally with white tips to its feathers. The under side is black, the head and fore part of the neck gleam with a purple light, the sides of the body are powdered with grey and spotted with white; the plumage of the legs is white, and the tarsus blackish grey; the eye is dark brown; and the beak greyish black. The female sometimes resembles that of the Capercali, sometimes the Grey Hen; but it is smaller than either. The length of the male is from twenty-five to twenty-eight inches; that of his mate twenty-one to twenty-two inches. [Illustration: HYBRID GROUSE (_Tetrao medius_).] The Hybrid Grouse are found wherever the Black Cock and Capercali inhabit the same district, and are particularly numerous in Scandinavia. They closely resemble their parents in general habits, although towards the former of these species they frequently exhibit a very pugnacious spirit during the period of incubation, and constantly do great damage to the sportsmen by attacking and disturbing the Grey Hen when brooding. "The Capercali," says Mr. Lloyd, "occasionally breed with the Black Grouse, and the produce are in Sweden called _Racklehanen_. These partake of the leading characters of both species, but their size and colour greatly depend upon whether they have been produced between the Capercali cock and Grey Hen, or _vice versâ_." Females of these hybrids are much more rare than males, but neither, according to Mr. Lloyd, are common.