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Hi Geoffrey, Julian and
others.
I have heard or read that Galah chewing of
bark actually helps fungi and insects to invade the wood of Eucalypts, thus
leading, in the long term, to the creation of new hollows.
I cannot provide scientific evidence of
this, but it does appear to make sense to me.
I cannot credit the Galahs (and other
Cockatoos) with the foresight to plan for that outcome, but on an instinctive
level, such behaviour could well advantage those species (and fellow
hollow-dwelling creatures).
Cheers
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