John Mariani said:A question - maybe someone out there knows the answer. On Dr. Geoff Hill's web pages he says that IBWO sounds (kents/double knocks) were heard on 41 separate occasions by the search team. How do they respond to these sound detections? Is there a set procedure they follow? Do they sit quietly and wait, play back calls of IBWOs hoping for a response, or try to approach the subject? I'm interested in knowing what they actually do under those circumstances.
Their paper at
has a long discussion of their sound recordings.
Regarding playback they state the following:
"Members of our search team never played kent calls or attempted to mimic double knocks, and we never encountered another birdwatcher in the area. We are confident that the sounds that we recorded were not made by a human attempting to mimic an Ivory-billed Woodpecker."