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White-chinned/Parkinson's Petrels, nw Peru, saturday (1 Viewer)


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Hi everybody,

I went on a little pelagic outing off the coast of Piura, in northwestern Peru last saturday, and Procellaria Petrels were some of the most common birds around. Many were clearly White-chinned, with a fully pale bill tip, and very rarely a visible white chin (see photos 1-3).
BUT, a number had a darker bill tip, with some looking fairly slim and long-winged, though unfortunately I never managed as good a photo as I did for White-chinned. I'm thinking those would be Parkinson's, but it's a species I've no experience with, so I thought I'd check with the experts.
(photo 4-5-6, the better ones, are of the same bird, each subsequent photo is a standalone)

As always, many thanks in advance!



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If/When the others are ID'd for sure as Parkinson's, Opus could use a flight image for the species.
I agree with your IDs. First three are White-chinned as you state. The rest all look like Black (Parkinson's) Petrel to me. Timing for wing molt and location favor that species. As well, in all photos the head looks more rounded / smaller and the bill less stout than Westland Petrel, and in some photos the slender / long winged look stands out as well, also favoring Black / Parkinson's.
Thanks Josh! The facebook pelagic folks reached the same consensus, so I'll put it up on ebird and add a pic to the gallery here.
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