A Lyrebird is either of two large ground-dwelling Australian birds, most notable for their extraordinary ability to mimic natural and artificial sounds from their environment. A lyrebird's call is a rich mixture of its own song and any number of other sounds it has heard. Lyrebirds commonly mimic other species of bird or animal, and not uncommonly include sounds as diverse as chainsaws, car engines, rifle-shots, and crying babies.
Australian folklore is rich with tales of lyrebird mimicry: if the story of a male lyrebird that used to regularly halt 19th century logging operations by mimicing the fire siren is not true, a hundred others are.
The lyrebird is so-called because the male bird has a long tail plume consisting of 16 highly modified feathers - two long slender lyrates at the centre of the plume, two broader medians on the outside edges and twelve filamentaries arrayed between them. During courtship rituals it fans the tail out over the top of its back, and the shape of the feathers strongly resembles a Grecian lyre. Albert's Lyrebird has smaller, less spectacular lyrate feathers, but is otherwise similar.
The classification of lyrebirds has been much debated. They were briefly thought to be Galliformes like the broadly similar looking partridge, junglefowl, and pheasants that Europeans were familiar with, but since then have usually been classified in a family of their own, the Menuridae.
It is generally accepted that the lyrebird family is most closely related to the scrub-birds (Atrichornithidae) and some authorities combine both in a single family, but evidence that they are also related to the bowerbirds remains controversial.
There are two species:
Lyrebirds are no longer endangered in the short to medium term. Albert's Lyrebird has a very restricted habitat but appears to be secure within it so long as the habitat remains intact, while the Superb Lyrebird, once seriously threatened by habitat destruction, is now classified as common. Even so, lyrebirds are vulnerable to cats and foxes, and it remains to be seen if habitat protection schemes will stand up to increased human population pressure.