Yep, I realise that. My poin was that I've read in a couple of books the 25%
figure quoted for WA - e.g. my Morecombe field guide (handbook) states "light
morph rare in E Aust., but about 25% of population in WA". I've often wondered
where this figure comes from as I've only ever seen one pale bird off Perth and
the south-west, despite having seen thousands of Wedgies. Having been made
aware of the results of Serventy, my suspicion is that data from the Shark Bay
population (either in Serventy's paper or from some other source) has been
misunderstood or mistakenly thought to hold for all WA Wedgies, and this is the
source of the field guide claims
John
> From:
> To:
> Date: Sun, 5 Feb 2012 18:30:36 +1030
> Subject: [Birding-Aus] Pale morph Wedge-tailed Shearwaters in WA
>
> Dom Serventy's 1972 paper The Shearwaters of Shark Bay WA. Emu 72 175-177
> stated that 20 to 30% of the small Shark Bay breeding colony of Wedge-tails
> were pale morph birds, not 25% of all Wedge-tails in WA waters.!
>
> Neil Cheshire
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