Total observation 
1 
» 
on the strength of this observation. 
Pale-footed Shearwater 
This casual species has not previously been recorded in the spring. 
Mottled Petrel Total observation 1 
The single bird was apparently all that was noted of this migrant 
species which is usually present at this time of year. 
Phoenix/Tahiti Petrel Total observation 2 
These birds occurred in the usual low numbers. My guess is that 
the Phoenix Island Petrels in the Grid are from the large Christinas 
Island colonies. I suggest that birds move west along the 5°N boundary 
area and disperse from there to the south. 
Pterodroma sp Total observation - 7 
Only one bird was designated as large or small. It was a White-wing/ 
Black-wing type. 
Bulwers Petrel Total observation 
Only one bird, seen with the Sooty flocks in the south was 
Leachs Storm Petrel Total observation 
The four White-rumped Storm Petrels collected were Leachs. 
Red - billed Tropicbird Total observation 
1 
counted. 
75 
1 
An unidentified tropicbird seen south of Howland was likely this 
species. The breeding population on Howland was beginning to rise 
slightly which should mean a more noted increase of grid birds during May. 
The one positive identification was in area F to the igest of Howland. 
Blue - faced Booby Total observation 47 
Red - footed Booby Total observation 3 
Brown Booby Total observation 5 
The expected concentration of boobies near the islands was noted. 
Blue-faces straggled out smoothly to greater than 110 miles. A single 
Red-footed immature was over 100 miles from Baker in the highly populated 
area 0. . • 
Frigates . Total observation 120 
Two-thirds of the birds were seen in a couple of swirls north of 
Howland circling with no apparent prey species in evidence. Ninety-four 
percent of the records were in flocks. 
