The voice of this species is but seldom heard except during the breeding season. The nest, which is placed in some thicket at no great elevation, is built of small branches of fir, birch, or pine trees, and the slight hollow that forms the bed for the young is lined with down from the body of the female parent. The eggs, from three to five in number, are large, and very various both in shape, colour, and size; the shell is thick, smooth, white, or greyish or greenish white, and more or less distinctly marked with spots of reddish brown or greyish blue, sometimes lying thickly together and sometimes very sparsely scattered over the surface. The female alone sits upon the eggs, and testifies the utmost solicitude and affection for her young brood, retaining her seat upon the nest in spite of repeated alarms, and doing battle with all intruders. Both parents seek the food necessary for the young family, though the female only is capable of preparing morsels delicate enough for the tender beaks of the nestlings, who, we are told, occasionally perish from hunger should they lose their mother and be left to the more clumsy ministrations of the male bird. The young are fed and instructed long after they have left the nest. Most numerous are the dangers to which the European Sparrow Hawk is exposed, for not only men, but all such birds as are more powerful than itself pursue it with unextinguishable hatred and animosity; in some parts of Asia, on the contrary, it is regarded with favour, owing to the facility with which it can be trained to hunt the smaller kinds of game, particularly Quails; in the southern districts of the Ural, according to Eversmann, large numbers caught in the summer are trained for this purpose, and after having been employed during the autumn are again let loose in order to avoid the difficulty of keeping them through the winter months. The female alone is reared for the chase, the male, when captured, being allowed to fly again, as useless. In India this bird and another species are regarded with equal favour, and are employed by the native falconers in the pursuit of Partridges, Quails, Snipes, Pigeons, and Minas. THE TRUE HAWK, OR GOS HAWK. [Illustration: THE GOS HAWK (_Astur palumbarius_).]