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lyrebird, either of two species of Australian birds (family Menuridae, order Passeriformes) named for the shape of their tail when spread in courtship display. The name also aptly suggests a musician. Inhabiting forests of southeastern Australia, lyrebirds are ground dwellers, and their brown bodies rather resemble those of chickens. In the so-called superb lyrebird (Menura superba, or M. novaehollandiae of many authors), the male’s tail consists of eight pairs of ornate feathers, which resemble a lyre when erect. There are six pairs of filmy, whitish feathers; one pair of 60–75-cm (24–30-inch) feathers that forms the arms of the “lyre” are broad and curled at the tip and are silvery on one side and marked with golden-brown crescents on the other. There are also two equally long “wires,” narrow, stiff, slightly curved feathers that correspond to a lyre’s strings; they are situated in the centre of the curved “arms.” With a total length of about 1 metre (39 inches), the male lyrebird is the longest of passerine birds.
When the male displays in small clearings, which he makes at several places in the forest, he brings his tail forward so that the white plumes form a canopy over his head and the lyrelike feathers stand out to the side. In this position he sings, while prancing in rhythm, far-carrying melodious notes interspersed with perfect mimicry of other creatures and even of mechanical sounds. Its breeding season is rainy winter, when insect food is abundant. Its nest is a large mound of sticks, usually on the ground, that contains a spacious chamber for the single egg. Nest building and incubation are done by the female, which resembles the male except in tail development.
Lyrebirds were formerly thought to be related to pheasants or to the birds-of-paradise. They are now grouped in the suborder Passeri.
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