Look at the birdie. Smile!

Photograph by ABC News journalist Nick Wiggins

The Bush Stone-curlew, or Bush Thick-knee, is a large, slim, mainly nocturnal, ground-dwelling bird. It is mostly grey-brown above, streaked with black and rufous. It is whitish below with clear, vertical black streaks. The bill is small and black, and the eye is large and yellow, with a prominent white eyebrow. Both sexes are similar. Young Bush Stone-curlews are similar in appearance to the adults, but are paler, and a little browner in colour. Bush Stone-curlews are nocturnal birds (night birds), doing all their feeding and other activities at night. 

If Bush Stone-curlews are nearby you may hear their eerie, high-pitched wailing at night. This ghost-like call is their contact call, and may be given by several birds in a chorus. Rendered as weer-lo, it is repeated four or five times, sometimes culminating in a trilled, screeching crescendo. It is sometimes also heard during the day, when stone-curlews are usually inactive, standing quietly in the shade with their eyes half-closed, or squatting on the ground where their cryptic plumage makes them difficult to see among the leaf litter. 

Listed as Endangered in New South Wales and Victoria. [Birdlife Australia]

The story of how this photograph came about can be found here.