g'day emma,

yes shooting is out of the question whether you live in suburbia or
not, they are a protected species. you could contact your local
councilor or ring the EPA office they are able to make decisions to
trap and relocate protected animals.

not sure if this will work but you could put a tin collar around the
trunk of the tree, flat sheet tin around 18 to 20 inches wide and long
enough to surround the trunk can be purchased from most hardware
stores or plumbing supplies. this collar should cover the tree trunk
from about 1.5 meters above ground level and above that to the width
of the tin, you can buy aluminium as well.

keep us informed

len

snipped
--
happy gardening
'it works for me it could work for you,'

"in the end ya' gotta do what ya' gotta do" but consider others and the environment
http://hub.dataline.net.au/~gardnlen/