Bermuda Petrel

Pterodroma cahow


Nick Bonomo
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eBird Checklist S60062838
BBC Pelagic 21 Sep 2019 - leg K
Nantucket, Massachusetts, United States
Search this location, Illustrated Checklist
Latitude and Longitude 40.0963, -68.4998 Map

Not specified
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Media notes

Observation details

All hell broke loose on the Helen H. Part of COSH-dominated mixed flock that was over skipjack tuna. First picked up the bird ~4:54pm approaching the feeding flock, viewing dorsum, NB’s initial impression was of a small, dainty gadfly petrel dark above with pale hindcollar that imparted a capped look, and white at base of uppertail that was reduced as compared to BCPE...all were alerted to this interesting bird’s presence. Closer inspection by TBJ/LDS/NB revealed thick dark underwing ulnar bar against white background and dark cowl broken by pale collar...IDing this bird as a somewhat messy body-molting Cahow. Compared to your typical BEPE, ours was a bit tricky in that it showed a narrow pale hind collar, a slightly larger-than-average whitish area at the base of the uppertail (somewhat light-dependent), and a reduced cowled effect due to that head/nape molt. It leisurely worked the area for some 40 minutes, making a few close passes, and good views were had by all. We covered over two miles with the bird per Capt. Joe Huckemeyer. Seen at one point in direct comparison with BCPE; size/bulk difference striking. An unforgettable experience shared by all stunned and thrilled Brookline Bird Club participants on board. Part of an epic feeding flock that also simultaneously (!) included Brown Booby, Black-capped Petrel, and Northern Fulmar.

Technical Information

Canon EOS 7D Mark II
Lens model
EF400mm f/5.6L USM
Focal length
400 mm
Shutter speed
1/2000 sec
Flash did not fire, auto
Original file size
5472 x 3648

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