The survey sounds a great idea.
For those outside Sydney's northern suburbs, the Australian Museum &
Birds Australia have an online survey for Superb Fairy Wrens at:
http://www.birdsinbackyards.net/surveys/
Also there are surveys about first annual observations of Koels and
Channel-bills and backyard birds.
I don't know about Superb FWs as indicator species though. They can
certainly persist in very heavily modified habitat This morning I
saw 2 at King Street Wharf (where the cruise ships dock) - in the heart
of Sydney's CBD. Their density is said to increase with some types of
disturbance so they may be (to some extent) an anti-indicator species.
The density of Superb FWs in Sydney northern suburbs in this map:
http://www.birdsinbackyards.net/results-backyards-2005.cfm
is surprisingly low and maybe the Northern Beaches survey will through
some light on this.
Andrew
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