Hi Penny
Of course these birds are a great concern.
The following report has sound guidelines for assessing the risks of introduced
(including self-introduced?) species.:
Bomford, M. (2003) Risk Assessment for the Import and Keeping of Exotic
Vertebrates in Australia. Bureau of Rural Sciences, Canberra. ISBN
0-9750443-3-8
Unfortunately it marks Canada Goose as having no overseas pest status, which I
think would come as a surprise to people in the UK and NZ.
Did our national bird organisations pick it up? I'm sorry I didn't but I would
like them to tell the list and/or their members what they propose to do about
these sightings.
Michael Norris
==============================www.birding-aus.org
birding-aus.blogspot.com
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