Species Account SIC 9 First Half 
% 
Puffinus pacificus 
This was the most plentiful Proce1lariiform excepting Sooty and Slender- 
billed Shearwaters* It was seen on al/days but one* Maximum numbers 
occurred the second day south of Oahu and between Howland Island and McKean 
Island. Dark phase birds predominated after the third day, sq'th of 17°north. 
Five orange streamered birds were observed, all withing 50 miles of Johnston 
Aboil. Although this species has not been recorded from Enderb&rry Island, 
33 were seen within ten miles of the island, actively feeding with a large 
flock• Numbers around Howland and Baker Islands were comparable with those 
of most other areas* Nine specimens were taken* 
Puffinus riativitatus 
Seven individuals recorded, four at 5°North, none near Howland or Baker 
Islands* 
Puffinus lherminieri 
Thirteen individuals were seen, all scfch of the equator* 
Puffinus puffinus newelli 
One of the 44 birds seen was within loo miles of Howland and Baker Islands* 
The rest were just south of Oahu* 
Puffinus griseus / tenuirostris 
The peak southward migration of at least one of these similar forms occur¬ 
red during the week from 13 to 21 September* At its peak birds were passing 
the ship at a rate often in excess of 150 birds per minute* A total of 
43,594 birds were recorded* Largest concentrations were found in close 
proximity to Howland and Baker Islands* During the peak period, many of the 
birds had dark underwings, but before and after the week of peak numbers 
most b: rds had silver underwings* This statement refers only to those 
birds which came close enough to the ship to permit clear views of the bird*s y 
underwings. All were heading SE, S, or SW* Eight were collected, all of 
which liad empty stomachs, very heavy fat, and enlarged gonads* 
Puffinus carneipes 
One bird was observed on 15 September, one day north of Howland Island. 
Pterodrom a phaeopygia 
One individual was seen just south of Oahu* 
Pterodroma £• externa 
All 96' of this form were seen north of 5°North. An additional 18 birds 
could not be identified to subspecies. Four specimens were taken* 
Pterodroma externa cervicalis 
All 21 birds of this form were seen north of 5° North. One was collected. 
