|To:||Geoffrey Dabb <>|
|Subject:||Re: FW: [canberrabirds] Cockatoos dropping rocks|
|From:||Martin Butterfield <>|
|Date:||Fri, 11 May 2018 00:45:03 +0000|
Back in the day, when I was living in Adelaide and fit enough to orienteer, one of the more risky course was a pine forest near Cape Jervis. The trees were very tall (perhaps 30m) and well endowed with very large cones: my guess was the cones were approaching 1Kg when green. When Black-Cockatoos were feeding on the cones they would occasionally lose their grip and gravity would assist the cones to descend, landing with a pronunced 'thud'.
I'm not sure of the physics of it, but am reasonably sure a cunning runner who was hit by a descending cone would not be well! As far as I know this never happened but I was always happy to be out of earshot of the cockies and the thuds of falling cones.
On 11 May 2018 at 09:32, Geoffrey Dabb <> wrote:
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