Barau's Petrel
Pterodroma baraui
Barau's petrel is around 40 cm long, and has white undersides and forehead. Its bill is black and its upper parts are dark, with a moderately distinct "M" pattern across the wings and back.
ID text from Wikipedia, CC BY-SA 4.0
Black-capped Petrel
Pterodroma hasitata
The black-capped petrel is large compared to other gadfly petrels, with a length of about 16 inches (40.5 cm) and 37 inches (94 cm) wingspan. The most similar species within its range is the Bermuda petrel, which is smaller and has a narrower white rump patch and an extensive gray cowl. The great shearwater is also superficially similar. The critically endangered or possibly extinct Jamaica petrel (P. caribbaea) was a related dark form.
ID text from Wikipedia, CC BY-SA 4.0
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Play today's Daily BirdPhotos and recordings are credited to their authors under the licence shown. Full profiles: Barau's Petrel and Black-capped Petrel.