h 
Juan Fernandez Petrels increased by $0% in June* As in May, the 
majority were concentrated south of 11°N, 187 being seen on June 9* 
Small numbers were seen daily above 12°N except near Oahu. Some Individuals 
were noted in the same stage of molt as most of the birds in May but in 
most molt had progressed to the outer primaries# Movement was much less 
uniform in direction than in May# 
Only 3 White-necked Petrels were recorded in May, while 6? were seen 
this month# The pattern of distribution was the same as for the Jnan 
Fernandez Petrel, with two areas of high density below 11°N (Table 1). 
Nearly all individuals of this subspecies were also undergoing obvious 
molt in flight feathers. 
Nearly three times as many Cook's Petrels were*seen this month as 
in May. Distribution of this species tended to be much more uniform than 
for the larger Pterodroma , though two slight concentrations were again 
noted below 11°N. In contrast to the Juan Fernandez - White-neck pattern, 
the area between Johnston Island and Oahu also showed a higher density. 
No uniform northwest movement existed this month. 
« 
Blue-faced Boobies - showed the same pattern of occurrence as in the 
previous two months, being limited almost entirely to the area north and 
northeast of the Line Islands. This population consists almost wholly 
i 
of immature and sub-adult birds. For the first time birds in complete 
immature plumage were seen in addition to the older individuals with 
i 
greatly varying amounts of white. These definite immatures probably re¬ 
present recently fledged birds. Molt had progressed to the outer primaries 
in many of the older birds this month. Six more birds banded on Jarvis 
Island were collected# 
