One bird banded on Enderbury was collected on 15 October, lliO miles 
southwest of Howland. Another five birds were collected, but not banded. 
Since the majority of Howland Island nesting tropicbirds are banded, I 
would expect to have collected at least one Howland Bird but since we did 
not it seems likely that the birds in the Grid represent individuals from 
other areas (in Phoenix and Line Islands) that are foraging in the area. 
No birds banded on these islands have been captured on Howland. 
Blue-faced Booby (130) 
Numbers of Blue-faced Boobies decreased this month by almost 200$ 
due mainly to the shorter amount of time spent in proximity to the islands 
However, the number of birds more than 60 miles from the islands increased 
Most of them were immatures which were probably leaving the Howland-Baker 
area to spend several months at sea before returning to land. This is 
suggested by the fact that birds with intermediate plumages between the 
immature stage and thesabbadult stage are seldom found on islands# 
Twelve birds that had been marked in various ways were seen up to 115 
miles from the point of origin-Howland Island (see Table 5). 
Brown Booby (11) 
Red-footed Booby (9) 
Numbers of both species decreased slightly this month. Monthly 
variations in the total number of both species are dependent mainly on 
the amount of time spent near the islands. 
* — 
