Pycroft's Petrel for Australia?

To: Roger McNeill <>
Subject: Pycroft's Petrel for Australia?
From: Tom Tarrant <>
Date: Tue, 28 Dec 2010 17:32:58 +1000
Please note that Rogers link is slightly incorrect

Try this one:


On Tue, Dec 28, 2010 at 3:18 PM, Roger McNeill

> All,
> Back in Oct a Jack Shick took a photo of a cookilara taken off Lord Howe on
> the
> way to Ball’s Pyramid.  At the time he thought it might have been a
> Gould’s.  I
> was sent a copy by a friend who thought it may be something else...I
> believe it
> to be a Pycroft’s.
> While living in NZ I spent a fair bit of time trying to suss out the
> differences
> between Cook’s and Pycroft’s and this bird is a very strong candidate for
> the
> latter.  I have seen about a hundred Pycroft’s and many hundred Cooks and
> it has
> all the indicative features that I am familiar with for Pycroft.  There are
> many
> that say these two species can’t be separated at sea but I believe that
> there is
> a bit of sliding scale with individuals on the far end being distinctive
> and not
> too difficult to separate.
> Because this would be a significant record for AU let me toss it into the
> public
> forum for debate.  I am in no way an expert but a few mates and I came up
> with
> some rules of thumb that were good ways to separate the two.  Of these, the
> features which stand out to me are:
> 1.       Strong dark grey hood and distinct eye-line
> 2.       Deep, thick and distinct mark under the eye which is greater
> behind
> than in front of the eye
> 3.       Unbroken underwing carpal bar
> 4.       And most distinctive which I have never seen published anywhere is
> a
> slight extension of the central tail feathers on Pycroft’s vs Cooks.
> I have asked Tom Tarrant to post this for me at the Australasian Bird Image
> Data
> Base.  Please find the image at the following link:
> Cheers,Roger<,Roger>
> Roger McNeill
> Samford Valley, SEQ
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Tom Tarrant
Kobble Creek, Qld
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