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Hi
Jean,
The
only thing or the closest thing to a count of these 2 species in Canberra is the
GBS. Although that does not attempt to resolve a total figure, that could be
done with some dubious number crunching. There are many assumptions that would
need to be made to do that conversion, such as that these birds are evenly
distributed in time and space, that the birds don't move from one site to
another and that every GBS observer week records all the birds
simultaneously present in their defined GBS area and stick to the same area of
about the same size. None of these assumptions really hold.
Either
way, it is clear that the populations of both species are clearly thriving and
increasing. Although the biomass of them combined is well short of that of
people.
Philip
3.45pm
- around the National Library, Finance, rose gardens and up towards Parliament
House yesterday, also feeding in grass, were countless numbers of S Crested
Cockatoos. I wondered if anyone has ever tried to count SC in
Canberra? I was surprised to see so many.
Jean
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