Nice photos Brother Colin.
The need to provide more deadwood and hollow trees in the effectively deforested urban areas we live in is one that has been increasingly recognised all over, there is some really excellent work being done in the UK by a number of groups.
E2_9.pdf
North America has also provided much of the solid evidence on which claims for the disasterous impact our clean urban forest is having and changes in management approaches to improve things.
0018.pdf
But Ekka's point is crucial how do we have these critically important habitat trees in areas where people live ie new subdivisions
The answer I believe lies in the way subdivisions are planned and what LGA's and State govts demand of the developers. Lets get away from the ridiculous idea that you can have forest canopy trees left as isolated individuals within a new housing estate. Lets not try to have massive forets giants in the residential street scape, but rather have specifications for green space in the subdivision the stipulates (where appropriate) remnant forest sections are left, protected during civils and house construction, left untouched (after being assessed to start with for suitability) away friom services roads gutters and property lines.
These can be our areas with habitat trees, really reflecting on what was present before and representing a sustainable volume of vegetation for generations rather than the 5-10yrs that is the average for trees left in subdivision at present.
SF