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.