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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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 (Grey-faced). 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. Mick
________________________________ Sent: Tuesday, 24 April 2012 7:21 AM
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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