2 - 
21 species were recorded and 78 birds of 6 species were collected. Except 
for a short period on 21 July, seas were too rough throughout the cruise to 
allow use of the small skiff for collecting purposes. 
Nocturnal observations were maintained from sunset to sunrise except during 
island operations. A total of 665 miles and 85*7 hours were completed during 
the grid period. A total of 2113 birds of 13 species were observed and 26 birds 
of 5 species were collected. Little opportunity was presented for collecting 
■ 
purposes at night. Although a considerable number of Sooty Terns were observed 
during nocturnal watches, the vast majority of these were accounted for during 
early dawn hours upon approach to Howland (up to 15 miles out). The pattern 
suggested a return to the breeding island at dusk from all points of the grid 
and early dawn exit from the island. 
Throughout the grid period, a total of 31,999 Sooty Terns were banded and 
streamered on Howland. The immediate-results during 
observations of streamered Sooty Terns and collection of 10 banded individuals 
at-sea are very encouraging. Valuable, much needed future data in the form of 
marked birds can be expected to result from these banding operations. 
Density (birds/linear mile) rose to 10.39 during the present cruise. This 
is the highest yet recorded for the year. Density was greatest in the vicinity 
of Howland - Baker as would be expected ( see table 7)» A decreasing number 
of flocks was concurrent with increase in distance from Howland-Baker throughout 
the cruise period. Direction of movement, collection of banded birds, and 
streamered bird sightings indicated that birds moved out from Howland in all 
