These singular looking birds, respecting whose habits we have only recently received reliable information, inhabit Southern Europe, Africa, and Asia, living in dry sandy deserts, bare or rocky plains, or bushy or woody grounds, and are especially numerous in the neighbourhood of low hills. They are usually met with singly, or in pairs, except when such as occupy the desert plains resort to water, which they do in flocks. When flushed, they rise with a low chuckling call, fly for a short distance, and then alight. If followed, they run along the ground for a few steps, and with difficulty rise again. "Others, however," Dr. Smith tells us, "fly to a great height and suddenly descend, when they approach the water on their feeding grounds; sometimes this descent is not commenced till they are directly over the spot on which they purpose to alight. On such occasions they are obliged to make a circular or semi-circular sweep, before they can reach the desired locality." Their food consists of hard seeds, bulbs, and insects, mixed with fine gravel. The two eggs which are deposited on the bare ground are elliptical in form, about seventeen or eighteen lines long by twelve or thirteen lines broad at their centre, and have a greenish-greyish yellow shell, marked, dotted, and streaked with various shades of greyish brown; in some instances one end of the egg is decorated with a wreath of spots. * * * * * The GROUSE TRIBE (_Tetraonidæ_) constitute the richest group of the entire order. These birds have a compact body, short neck, small head, and short powerful beak, with a thick base. The foot is short, the tarsus moderate; the wing of medium length, and usually much rounded; the tail is generally straight, but in some instances pointed or incised at its extremity. The thick plumage in most species extends over the entire body, even to the toes; some few also exhibit bare patches of brightly-tinted skin. The sexes are nearly alike in colour. The members of this tribe inhabit almost every latitude of the globe. * * * * * The GROUSE PROPER (_Tetraones_) are recognisable by their powerful, compact bodies, short, or moderate-sized wings, and short straight tail; the latter, however, is occasionally long, and either wedge-shaped or forked at its extremity. The bill is strong, thick, short, and much vaulted, and the foot low and powerful, with more or less well-feathered tarsus. The plumage is thick and rich, the brow and nape often exhibit bare patches, covered with small horny plates of a bright red colour. The toes of some species are covered with a short and remarkable horny growth. [Illustration: PALLAS'S SAND GROUSE, OR SAND GROUSE OF THE STEPPES.]