5 
Leach’s Storm Petrels (22+1 nocturnal) 
White-rumped Storm Petrel (88+24 nocturnal) 
All nine storm petrels collected are referable to this species. There was 
an increase of 75 percent over last month indicating its return from the Aleutian 
breeding grounds to the Grid area. None were recorded last September. 
Red-tailed Tropicbird (l6+2 nocturnal) 
Approximately the same number was recorded last month. One individual 
banded on Christmas Island in November 1964 was collected on 17 September about 
hm 
75 miles NW of Howland Island. Only five were recorded last year. 
White-tailed Tropicbird (3) 
Two White-tailed Tropicbirds were recorded in August and four were noted last 
September. 
Blue-faced Br (393+13 nocturnal) 
Brown Booby 
Due to the increased activity near the islands numbers of both of these boobies 
increased this month. The majority of the sightings were made within 30 miles of 
the islands. 
Red-footed Booby (31+3 nocturnal) 
Almost 50 percent of the Red-footed Boobies seen were in one feeding flock 
15 miles west of Howland on 19 September. 
Great Frigatebird (l) 
Lesser Frigatebird (2l8) 
Frigatebird spT (285+4 nocturnal) 
The number of frigatebirds recorded this month was approximately the same as 
last month. Most of the sightings were made within 30 miles of the islands. As 
noted previously frigatebirds are almost invariably associated with Sooty Tern 
flocks. 
