len gardener wrote:

in the burbs we only ever had 2 permanent birds. might be something to
do with gender or available habitat?

habitat usually. Depends on the size and pickings there in.

We seem, for the last few years, to have a permanent adult pair who can
successfully breed a pair each year, but we have 7kns of urban bushland
closeby. I am starting to find out that few of the neighbours have
anything but concrete and pools in their backyards.