I've seen a female Galah encouraging a male to chew away at a large mannifera.
It may have a function in creating more hollows, or it may be a sexual
selecton thing. The female chooses a male who can chew trees
efficiently!
John Leonard
On 19 July 2010 13:23, Julian Robinson <> wrote:
> I have wondered before if it was an evolutionary thing to create more
> hollows? Some support for this might be that bark-chewing birds apparently
> pay more attention to Manniferas than other eucalypts – perhaps they pick on
> them because they are more susceptible to dropping branches anyway and are
> therefore easier targets?
>
>
>
> Either way, arborists earn a lot of money erecting galah and corella-proof
> protection to vulnerable parts of target trees to prevent this activity.
>
>
>
> Julian
>
>
>
> From: Judy Corp
> Sent: 19 July 2010 12:44
> To: 'Janet Russell';
> Subject: RE: [canberrabirds] Tree damage caused by Galahs
>
>
>
> Hi
>
>
>
> Yes we had a large eucalypt and the galahs used to bark it regularly. I was
> worried they would kill the tree and perhaps they did contribute to its
> demise.
>
>
>
> Judy
>
>
>
> From: Janet Russell
> Sent: Monday, 19 July 2010 11:33 AM
> To:
> Subject: [canberrabirds] Tree damage caused by Galahs
>
>
>
> My husband saw a Galah cause the damage shown on the gum tree on enclosed
> photo. The tree is in a neighbour's garden. It appears to have been caused
> by only one bird and the tree is a brittle gum (Eucalyptus mannifera). The
> main damage extends a fair way round the tree both sides but I could see
> that it did not extend right round it. Has anyone seen Galahs or other
> birds doing this?
>
>
>
> Janet Russell
>
> Aranda
>
>
>
>
--
John Leonard
Canberra
Australia
www.jleonard.net
I want to be with the 99,999 other things.
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