Cockatoos do a similar thing with street trees in Canberra, only as
they don't go around in such large flocks the damage isn't a
noticeable.
It may have something to do with beak sharpening.
John Leonard
On 11/04/2008, Jan England <> wrote:
> I wonder if anyone knows why Little Corellas are forming into the huge flocks
> that cause devastation to trees.
>
> I have experienced it a number of times over the years in both the east and
> west of Australia. Last year at Millstream-Chichester NP in WA, the ranger
> closed the campground when hundreds of Little Corellas descended on the
> Crossing Pool campground breaking branches off the melaleucas which littered
> cars, tents, tables, etc. He was afraid that someone would suffer an eye
> injury.
>
> Over the years on a farm out of Biloela, the Corellas have visited some
> apple gums surrounding a waterhole where they broke off all the branches.
> These trees seem to regenerate each year so it hasn't been a problem.
> However, this year they have attacked a large poinciana tree on the same
> property and completely denuded it to the extent where the owner is afraid it
> will die.
>
> It appears they do not select one particular type of tree. They just seem
> to break off the last 45 cms (18 inches) of each branch until there are no
> leaves left. I would be interested to hear if anyone has any theories on
> the subject.
>
> Jan
> www.birding-aus.org
> birding-aus.blogspot.com
>
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--
John Leonard
Canberra
Australia
www.jleonard.net
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