The installation work "forgotten songs" . The art work completed in 2011 by Michael Thomas Hill- "Forgotten songs" commemorates the songs of fifty birds once heard in central Sydney but are no longer due to the settlement of Sydney. High above the street are a canopy of birdcages and as you walk down the lane you will hear the sounds of bird calls.

http://traveldrinkdine.com/australia-2/essential-sydney-the-must-see-sites-of-this-vibrant-city/

An installation work in Tate Britain, I notice how to hang the art work use tool and stone.