Enigmatic and on the edge

Senior threatened species officer Rainer Rehwinkel helps plant Drooping Sheoak seedlings at a Googong property in the hope of bolstering food supplies for the Glossy Black-Cockatoo. Photo: Kim Pham.HUNDREDS of Drooping Sheoak seedlings are being planted around the region in an effort to make meal times a little easier for the Glossy Black-Cockatoo.
Image by Justin BeckAll week long we've been playing this sound, and asking you to guess what exactly it is and where exactly in the Bay Area we recorded it.