Wednesday, October 24, 2012

Torresian Crow numbers dropping dramatically

The genetic diversity for the Torresian Crows in Tenterfield is entirely limited to it's own family members within one family group or possibly two. I'm starting to think all the Torresian Crows of Tenterfield are related to each other. The Torresian Crow that visits my place does not have a mate as far as I know. Just this year it's only offspring had left the area, and the remaining parent is always seen by itself. After quite a few years it still has white eyes. The blue-eyed crows left a long time ago.

Currently Torresian Crows, at least 2 pairs, are breeding (at the bottom of ST Joseph's Primary School and Jubilee Park) but offspring being born and actually survive is not good. About every 3 or so years I see a new generation of Torresian Crows but only one of which survives until it is old enough to fend for itself. The food demand for the chick/juvenile offspring is incredibly high until it is old enough to fend for itself.

Tenterfield's current population of this species mostly consists of younger generation birds - either children or grandchildren of older Torresian Crows. But here lies the problem - there is no other Torresian Crows, that I am aware of, that come into Tenterfield to increase the general population of this species. If there are others nearby they do not come into Tenterfield at all.

All that exists of this species in Tenterfield is less than 10 birds now. They seem to mostly inhabit the south-west corner of Tenterfield. These birds have been known to travel all across town searching for food when they are not breeding. They spend most of their lives near the Tenterfield Creek. They are a resident species of Tenterfield but some of them have already left the area completely. Torresian Crows are not a well liked bird in town but soon even they will eventually leave the area or die out as there is simply not enough food around to feed many chicks with. The crows that are here do not look hungry even though they scavenge through the rubbish bins. Nature is taking it's course with this species and I believe no-one will miss this species in town when they are gone (except me).

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