Emu gizzard stones

To: "birding aus" <>
Subject: Emu gizzard stones
Date: Mon, 7 Jun 2010 18:02:03 +1000

I have just returned from a week's fieldwork at Ned's Corner in NW

While looking for megafauna bones and Aboriginal occupation sites at Little
Lake Walla Walla, we came across a deposit of small stones that were
clearly not cultural and were not a result of normal sedimentary processes.
The best explanation we could come up with was Emu gizzard stones or
gastroliths (or perhaps Genyornis gizzard stones).

I recall a paper several years ago that looked at the use of Aboriginal
stone artefacts as gizzard stones and their subsequent re-distribution
across the landscape but I am not aware any papers on gizzard stones.  If
anyone knows of any gizzard stone studies, I would appreciate the

There is an inherent conflict between archaeology and bird observation but
I did manage to look up on enough occasions to see a good range of Mallee
birds including Mulga and Red-rumped Parrots, Bluebonnets, Mallee
Ringnecks, Southern Whitefaces, White-winged Fairy-wrens, Yellow- and
White-plumed, Singing and Black Honeyeaters, Grey and Pied Butcherbirds
(with overlapping territories), Black, Whistling and Black-shouldered Kites
and lots more.



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