- 2 - 
Sooty Shearwater 
(Puffinus griseus) 
Sooty-Slenderbill 
Three birds identified as Sooty Shearwaters and two as Sooty 
Slender-bills were observed from December 2 to December lu These birds 
may represent non-breeding individuals as the migration was over by the 
middle of November. All birds were heading south. 
Juan Fernandex Petrel 
( Pterodroma externa ) 
White-necked Petrel 
A total of 20^ petrels of this species were identified the first 
half of the trip. On the return route only lU were seen. Large flocks 
were encountered from December 2-5. These flocks were composed of both 
sub-species with Juan’s outnumbering White-necks about 20-1. Both sub¬ 
species were evidently preparing to migrate to their breeding grounds. 
The migration is probably nocturnal as some compact flocks were observed 
testing in the day time, and no direction was noticed in any flock of 
Pterodroma externa . 
Dark-rumped Petrel 
(Pterodroma phaeopygia) 
A 
Only two of these birds were observed and both were about 200 miles 
south of Oahu. Between Hawaii and 5°N. seems to be the normal wintering 
area for this species. 
Kermadec Petrel 
( Pterodroma neglecta ) 
Kermadec*s were fairly abundant this time and were observed with 
flocks of P. externa . All birds appeared in heavy molt. Several color 
phases were noted. These birds may migrate with P. externa back to the 
breeding grounds. 
Phoenix Is.-Tahiti Petrel 
( Pterodroma alba ) 
Six individualsof either or both of these species were observed 
on the 2nd and 3rd of December. These two species are truly the most 
difficult of any Pterodroma to seperate in the field. 
Murphy's Petrel 
( Pterodroma ultima) 
One individual identified as this species and a second logged 
as Pterodroma species may have been "this rare Pterodroma . The difficulty 
involved with separating them from Pterodroma neglecta is acknowledged but 
the underwing pattern and the shape of the wing is different from that 
species. I believe that Murphy’s is a rare but perhaps regular species 
in Hawaiian waters. 
