Buller's Shearwater (Ardenna bulleri)

OTHER NAMES: Gray-backed Shearwater, New Zealand Shearwater
Latin Etymology: Ardenna ("of Ardennes") bulleri (named for Sir Walter Lawry Buller)  

Adult Buller's Shearwater (Ardenna bulleri) on Half Moon Bay Pelagic - September 2022

Featured Subspecies: N/A
Weight: 342-425g  /  Length: 46-47cm  /  Wingspan: 97-99cm
NO UK STATUS/ IUCN Red List: Vulnerable

A larger shearwater with a distinctive pale back marked by a large "M" shaped marking across the back of the wings. It nests primarily on the islands of Tawhiti Rahi and Aorangi off the coast of New Zealand where it nests in burrows or crevices. Outside the breeding season it roams much of the Pacific ocean, largely in a clockwise direction.

Related Species:
Order: Procellariiformes
Family: Procellariidae
Genus: Ardenna
SUBSPECIES: none - monotypic 

 - Sighting Locations -

UNITED STATES 
- CALIFORNIA 2022 TRIP: Seen on the Half Moon Bay Pelagic Trip

A pelagic Pacific species seem offshore from the West Coast and Hawai'i

Further Notes: BirdForum Opus, IUCN Red List, RSPB, Wikipedia, Xeno-canto