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Bonin Petrel

Pterodroma hypoleuca

The Bonin petrel or nunulu (Pterodroma hypoleuca) is a seabird in the family Procellariidae. It is a small gadfly petrel that is found in the northwest Pacific Ocean. Its secretive habits, remote breeding colonies and limited range have resulted in few studies and many aspects of the species' biology are poorly known. The Bonin petrel is a small gadfly petrel, 30 cm long with a wingspan of around 67 cm. It has a white head with a black cap and face markings; overall the head often has a scaled appearance. Its pale grey upperparts have darker primaries and wing coverts creating an "M" mark across the back. The underwing is white with dark edging and a patch at the carpal joint and across underwing coverts. The tail is dark grey, and the rest of the plumage is white, except for a dark half collar on the breast. Like the rest of the Pterodroma petrels the black bill is short and hooked. The legs and feet are pink with dark patches.
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Bonin Petrels on Birda

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Profile picture for Zeke Smith
Zeke Smith
18 Jan 2020 - 6:32pm
United States Minor Outlying Islands
More Petrels, Shearwaters, Diving Petrels
Kerguelen Petrel
Aphrodroma brevirostris

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