Francolins are found in family parties rather than coveys, and prefer localities near water, though these may consist of rushy swamps, cultivated lands, stony slopes, or maritime plains. Dry situations are, however, favoured, a sufficiency of cover being the chief requisite, and an altitude of six thousand feet being occasionally attained. Some forms roost upon the ground and apparently never perch, others–especially in South Africa–resort habitually to trees at night or when disturbed; but probably the style of country and the amount of persecution account for this difference, while the decrease of the commoner species in certain parts emphasises the fact that they are an easy prey to gunners and other foes. These birds run with great rapidity, and are extremely difficult to flush, still more so for a second time; when forced to rise they do so with a whirring noise, and fly off heavily but swiftly, to pitch again as soon as possible. Reposing in the shade during the hot hours, they feed in the morning and evening, at which times the loud, shrill cry of three bell-like notes, or the "hysterical laugh," may be heard in all directions. The diet consists of insects, shoots of plants, berries, seeds, and bulbs, the powerful bill being used for digging. The well-concealed nest resembles that of a Partridge, the six to fourteen eggs, found in {228}autumn as well as spring,[163] are olive-brown or buff, occasionally with small brown spots or a few white shell-markings. _Ammoperdix bonhami_ of South-West Asia is a desert form of an isabelline colour, with blue-grey crown and throat, black forehead and superciliary stripes, white lores and ear-coverts, a few black markings near the rump, chestnut hues on the tail and flanks, and longitudinal black bars on the latter. _A. heyi_, ranging from Nubia to the Jordan Valley and the Persian Gulf, has no black on the head, the frontal band being white, and the cheeks and mid-throat chestnut. The rufous and buff females of the two species are indistinguishable. They inhabit wastes and stony ravines up to four thousand feet, in pairs or small coveys; crouching, to avoid detection, on the ground, which matches their colour; flying like Quails; and uttering a reiterated double whistle. The eight to twelve eggs, of a plain drab tint, are deposited among stones or under tussocks, with hardly any nest.