CROW TRIBE. 3 2 3 
inhabits, the grey struthidea (Struthidea cinerea ) is confined to the rocky hill- 
ridges of Southern and Eastern Australia. The eggs are four in number, and are 
white in colour, blotched with reddish brown and grey; the nest is of mud, 
thickly lined with fine grass. The struthidea feeds principally upon insects, 
chiefly beetles. I he two sexes are so nearly identical in size and colour that they 
can only be distinguished by dissection. This species differs from many other 
GREY STRUTHIDEA liat. Size). 
Australian birds by reason of the sober colour of its dress, which is inconspicuous 
and little likely to attract attention. The general colour both above and below 
is grey, each feather being tipped with lighter grey; the wings are brown, and the 
tail is glossy black, with a greenish lustre on the outer webs of its feathers. By 
many writers this and the next genus are placed among the shrikes. 
The small genus Gymnorhina includes only three species, 
Piping Oro^rs ^ 
popularly known as Australian magpies by reason of their black 
and white plumage, which is common to both sexes, and never varies. 
