Re; Leucistic Providence Petrels.

To: Paul Walbridge <>, "" <>, Dion Hobcroft <>
Subject: Re; Leucistic Providence Petrels.
From: Mick Roderick <>
Date: Mon, 23 Apr 2012 15:57:12 -0700 (PDT)
Thanks Paul and Dion,
Yes, we never really considered Kermadec and Herald as 'serious' contenders but 
still wanted to be sure what it was. The concensus is that it is a Great-winged 
Re: the White-necked (dare I say "type"), I'm sourcing images of the underwing 
from the proper photographers who were on-board, as well as size-comparison 
shots. I didn't get any of the latter and admittedly didn't make an effort to 
do so on the day. I did comment to Steve that the flight pattern of the bird 
was much more shearwater-like than typical large Pterodroma flight. But I've 
seen quite a few White-neckeds before and I certainly cannot say I noticed 
anything overly different jizz-wise on this bird.

From: Paul Walbridge <>
Sent: Tuesday, 24 April 2012 7:21 AM
Subject: Re; Leucistic Providence Petrels.
Hi Dion, Mick, I often see leucistic Providence Petrels up here and it 
shouldn't be confused with belly plumage wear commonly seen later in the season 
(August-October) in worn adult birds. We photographed one on the recent sea 
mounts trip which had a broad crescent of pure white feathers in the breast and 
in addition to the normal whitish face feathering had frosty white feathering 
going up further over the head. The most extreme example I've seen was a bird 
in 1998 (can't relocate photos taken at the time) which had the general plumage 
configuration of a Tahiti Petrel, which no way could be attributed to plumage 
wear. As Dion points out Providence Petrels are almost identical in structure 
to Grey-faced Petrels, not at all like Kermadec and even less like Herald. A 
lot of Kermadecs (but not all) can also show a whitish leading edge to the 
inner wing but Herald shows an extensive pale 'flash' down through the 
secondaries. Cheers - Paul.

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