canberrabirds

Tree damage caused by Galahs

To: "'Canberra Birds'" <>
Subject: Tree damage caused by Galahs
From: "Geoffrey Dabb" <>
Date: Mon, 19 Jul 2010 14:51:33 +1000
Not a complaint about re-airing of this interesting topic, but it is a
recurrent one.  Anyone wishing to explore it further will find quite a bit
about it in the archive for July last year.

-----Original Message-----
From: John Leonard 
Sent: Monday, 19 July 2010 2:16 PM
To: Canberra Birds
Subject: Tree damage caused by Galahs

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.

****************************************************************************
***************************



<Prev in Thread] Current Thread [Next in Thread>
Admin

The University of NSW School of Computer and Engineering takes no responsibility for the contents of this archive. It is purely a compilation of material sent by many people to the Canberra Ornithologists Group mailing list. It has not been checked for accuracy nor its content verified in any way. If you wish to get material removed from the archive or have other queries about the list contact David McDonald, list manager, phone (02) 6231 8904 or email . If you can not contact David McDonald e-mail Andrew Taylor at this address: andrewt@cse.unsw.EDU.AU