Like Partridges in appearance, and varying from the size of a large Fowl to that of a Quail, Tinamous are essentially ground-birds, and rarely perch, some species being solitary and others forming coveys; they haunt the undergrowth of thick forests, dry bushy and grassy flats, or–exceptionally–rocky mountains. The flight is strong and extremely swift, accompanied by quick vibrations of the wings, occasionally varied by a gliding motion; so reckless moreover is the pace that individuals are frequently killed by striking against the first obstacle they meet on rising. To flush them, however, is often a vain attempt, as they run with amazing rapidity, and are readily concealed by the surrounding vegetation. The voice–a trill or mellow whistle of several notes–differs somewhat according to the species, and may be heard even in winter; the food consists of seeds, berries, roots, bulbs, spiders, insects and their larvae, maize- and potato-crops being at times seriously damaged. A hole is scraped under shelter of a tussock or bush, and scantily lined with dry leaves or herbage, to receive the eggs, deposited in some districts almost throughout the year; these are oval, and so wonderfully burnished as to be totally unlike those of any other bird. They vary, according to the species, from reddish-chocolate, wine-purple, or liver-colour to dark blue, bluish-green or primrose, and number from four or five to sixteen; though the smaller figures are perhaps the most reliable, as larger sets, though not uncommon, may be the produce of more than one hen. As in the Turnicidae, and to some extent in the Ratitae, the male alone incubates, sitting about three weeks, and feigning disablement to decoy intruders from the nest. The flesh is very delicate, and good sport may be had with some species near the holes where they daily dust themselves. {184}As will be seen from the following examples, the general coloration is rufous or slaty-brown, which may be relieved by buff, or barred with blackish above and even below; the under parts being often greyer, with whitish throat and belly. The sexes do not differ greatly, but the female is, if anything, the larger bird. Some six forms occur in Mexico, while of the remainder _Tinamotis ingoufi_ extends the range to Southern Patagonia. [Illustration: FIG. 42.–Great Tinamou. _Rhynchotus rufescens._ × ⅕]