4 
2 . 
Audubon’s Shearwater ( Puffirms lherminieri ) 15 
All 15 birds were encountered in a large mixed feeding flock about 
11 miles north of McKean on 15 July. These most likely were birds of 
that island. 
iir 
mi Fernandez Petrel ( Pterodroma externa externa ) 
White-necked Petrel (P. £. cervicalis~ ) 
unidentified 
26 
8 
2 
Practically all sightings of these two races were from ca. 6-7°N and 
northward. Both subspecies were encountered together over much of the 
occupied range, but White-necks were only about one third as abundant as 
Juan Fernandez. 
Black-winged Petrel (Pterodroma hyooleuca nigripennis) 
59 
Distribution of this species roughly parallelled’ that of the large 
Pterodroma externa forms, with greatest numbers north of 6°W. The majority 
of u2 unidentified Pterodroma are most likely referable to this race. 
Bulwer’s Petrel (Bulweria bulwerii) 
22 
Seventy-seven percent of the birds seen were recorded just south of 
Oahu on 8 June. 
Storm Petrels 3 
One White-throated Storm Petrel ( hesofregatta albigularis ) was seen 
just north of McKean, one of the breeding islands. Two Leach’s (Oceanoaroma 
leucorhoa ) were recorded between McKean and the Southern Grid. Although 
the bulk of the population of Leach’s would be expected to be on the 
Alaskan breeding grounds at this time, past summer cruises through the 
eauatorial belt have recorded low densities of non-breeders. 
m- 
ropicoiras 
Fed-tailed 
White-tailed 
6 
19 
Both species in low numbers throughout the cruise. The only high 
density was the expected White-tail just north of Samoa, one of the major 
breeding grounds in the south. 
Boobies 
Blue-faced 
Brown 
Red-footed 
9 
2 
19 
Low numbers of all three species throughout 
recorded off Fanning Island on 12 June. 
Most of the Red-foots 
