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Interesting idea and may work on that basis although it involves long
term benefits maybe outside the life of the individual, which makes it hard to
support strongly. A more immediate benefit that is relevant to the individual
doing it is that it can be similar to marking territory that the birds maintain
a connection to a nest site through the year which means that they don't need to
expend as much energy to re-establish or find a new one at the start of each
nesting season.
Philip Veerman
24 Castley Circuit
Kambah ACT 2902
02 - 62314041
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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