?LUE-FACED BOOBY - 
LS/f 21 (cont.) (BBC notes) 
. i Jr^s-rtitaiw • 
Annotated List 
LISIANSKI 
Besides the clubs there were numbers of small roosting 
aggregations of adults, usually fairly loose assemblages 
of from 8 to 10 birds, particularly on and just above 
the beaches of the north, northwest, and west sides of 
the island. Most of these aggregations had roughly the 
66666number of dependent? immatures as would account for 
the number of adults present. Such aggregations 
I suspect, represent the intermediate stage of club 
J formation at the end of breeding and before the birds 
have gone to roost in the large clubs themselves (probably 
ture for both immatures and adults.) 
- 
• v 
4 
LQL 22 Mar; 20-21, '68 (BBC Bept.) 
j 
i 
430 
C. 225 
Blue-faced Booby 
Estimated population —---—-* 
Nesting population —-*--- 
Results of sample nest count (be¬ 
lieved to be about 85-90 percent 
complete) : 
# of nests counted —-—- 
# of nests with eggs —--—- 
# of nests/naked young* --*-- 
# of nests/small downy young-•—- 
# of nests/medium downy young-- 
Number banded: 18 (9 A-M, 9 A-P) 
Number returns: 1^-6 (76 A-M, 69 A-F, 
98 
76 ( 78 ^) 
6 ( 656 ) 
15(15$) 
« 1» 
1 A-U) 
The nesting cycle of the Lisianski Blue-faced Boobies was in advance 
of all other islands where we found it nesting,with the possible exception 
of Green Island, Kure Atoll. 'Nonetheless, nearly 50 percent of the popu¬ 
lation was still in prenesting pairs. 
On the afternoon and evening of the 20th I attempted to make as com¬ 
plete a nest count as possible and get pair data for as many birds as I 
could. The island was arbitrarily divided into three areas to see if one 
area or another was more favored by the early nesters. Area 1 was from 
the Fish and Wildlife Refuge sign (camp) around the north end of the 
island to where a distinctive, dike-like portion of rocky reef extends 
outward from the east side of the island'( = roughly the northwest, north 
and northeast half of the east perimeters). Area 2 was from this point to 
the high south point of the island ( = roughly the southeast half of the 
east perimeter). Area 3 was from the high south point to camp. ( = 
roughly the south, southwest and central west perimeters). As Table 1 
below shows, there appeared to be little difference in the stage of nesting 
from area to area, and allowing for differences in size of the sample area, 
little difference in nesting density from area to area® 
* Includes nests that also contained an egg 
