gonads, very heavy fat and empty stomachs. At sea no individuals gave any 
indication of feeding behavior. They were often noted flying directly through 
feeding flocks of mixed terns and other shearwaters without slowing their flight. 
Single birds were commonly seen toward the end of the cruise, whereas during 
the height of the migration, single birds were seldom noted. 
Christmas Is land Shearwater a = 6 b = 1 c = 15 
The majority of birds (ll) was seen on October 28 and 51 near Christmas 
Island where large numbers of this species breeds. Four were seen along 5°N, 
north of Howland Island. Most birds were single sightings; apparently this 
species does not form large feeding congregations, even near the breeding 
islands. None was collected. 
Audubon's Shearwater a = 0 b = 15 c = 19 
Greatest numbers of this species were recorded near Canton Island and 
Christmas Island. Most birds were single sightings. Although superficially 
similar to Newell r s Shearwater, the much smaller size, faster flight pattern 
and less extensive white rump patches of the Audubon r s separate it quite readily 
from that species. None was collected. 
Newell r s Shearwater a = V5 b = 0 c = 2 
One bird was sighted between Oahu and Christmas Island. All others were 
recorded just south of Oahu. None was collected. 
Pale-footed Shearwater a = 1 b - 1 c=0 
One bird was observed north of Johnston Island on 15 September and another 
on 11 October north of Samoa. None was collected. 
Dark-rumped Petrel a = 1 b = 0 c = 0 
One individual was sighted south of Oahu on 7 September. None was collected. 
Vhite-necked Petrel a - 21 b = 0 c = 1 
individuals were sighted between Oahu and 
Greatest 
were 
