I was about to reply to John Gamblin's comments about cockatoos' and other
parrots' call in flight by remarkign that when humans run and are breathing
deeply, any verbal communication has to be coordinated with the breaths. But
then I remembered that birds have quite a different resperatory system
(isn't it the air goes into the lungs and them is circulated via air-sacs in
the bones? can someone give a concise description of this please?), so the
point probably doesn't apply to birds. It's probabl;y the case with birds
that, like mammals at rest, they can make vocalisations whih are not
strictly cooridnated with the inspiration and expiration? like a set of
bagpipes, they have a good reserve of air!
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John Leonard (Dr),
PO Box 243,
Woden, ACT 2606,
Australia
'Words had to change their ordinary meaning and to
take that which was now given to them.'
Thucydides III 82
http://www.spirit.net.au/~jleonard
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