The Brown Treecreepers into a woodland remnant near Canberra comment is relevant but they are quite different situation from Superb Fairy-wren and White-browed Scrubwren. Or maybe I am just thinking of Canberra, where the latter two species are still so common and dispersive, that they re establish themselves constantly, just through normal dispersal. (Hard to suggest a need for such a program here for those species.) Sure due to the numbers of Pied Currawongs and cats, (and possibly Collared Sparrowhawks), urban areas may be a bit of a population sink for them. In contrast, the Brown Treecreepers has declined from formerly reasonably widespread to very few colonies, that are very isolated. We do not have Brown Treecreepers just passing through Canberra suburban habitat but the other two species constantly do and breed successfully in suburban gardens and parks (I have had both species at least once successfully raising young in my very ordinary little suburban garden).
Philip Veerman 24 Castley Circuit Kambah ACT 2902
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