BLACK-CAPPED PETREL Pterodroma hasitata

BLACK-CAPPED PETREL Pterodroma hasitata 
Capped Petrel
L 35–46 cm, WS 89–102 cm.

IDENTIFICATION 
Transatlantic vagrant (breeds Hispaniola in Caribbean). Large Pterodroma, larger than Manx and Yelkouan Shearwaters, with flight action typical of the genus (see Fea’s). Species distinguished from similar-looking shearwaters by differences in structure and flight action in same way as Fea’s (q.v.) and, in case of Great Shearwater, by much greater extent of white on collar and rump (although some individuals have these areas largely or wholly obscured by dark feathering), white forehead and lack of dark smudge on belly (although this not always easy to see on Great Shearwater and sometimes absent). From Fea’s and Zino’s by extensive
white (bordered black, with diagonal black bar of varying prominence) on underwing and, usually, by obvious white rump and collar contrasting with brownish-black cap.

VOICE 
Silent at sea.

STATUS/HABITAT 
Vagrant (W Europe). Pelagic away from breeding colonies.