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Hi Peter.
Thanks for the informative reply re Galahs
chewing resulting in a tree hole forming.
Given the time lag, I am confident we can
rule out any conscious "intention".
As for Galah numbers, I recall that my
father, when writing "Birds of the ACT: Two Centuries of
change" discovered a note made by the Schoolteacher at Duntroon (in the
very early days of Duntroon's establishment as part of the Campbell family
estate) that he had seen "a pair of
Galahs".
I think that tells you
something.
Of course, land clearing and farming have
advantaged this species enormously, since those early pioneering
days.
Cheers
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