Table 1. Results by area of 20 March 1968 nest count of Blue-faced Boobies 
on Lisianski. 
Contents of nest 
Nests/ 1 egg 
Nests/ 2 eggs 
Nests/ egg & naked young 
Nests/ 1 naked young 
Nests/ 2 naked young 
Nests/ 1 small downy young 
Nests/ 1 medium downy young 
Total nests/ eggs 
Total nests/ young _ 
Total active nests 
Area 
X. 
Area 
1 2 
Area 
3 
Totals 
Wo. 
“3 
No. 
it 
No. 
A 
HSL- 
A 
9 
(2 5) 
6 
( 27 ) 
10 
(2 5) 
25 
( 26 ) 
20 
(56) 
11 
(50) 
20 
(50) 
51 
( 52 ) 
1 
( 3) 
- 
( 8) 
4- 
( 4) 
1 
( 3) 
- 
mm 
1 
( 1) 
- 
- 
1 
( 3) 
1 
( 1) 
5 
(14) 
k 
(18) 
6 
(15) 
15 
(15) 
- 
1 
( 5) 
- 
1 
29 
( 81 ) 
17 
(77) 
30 
W 
76 
(78) 
7 ( 19 ) 
5 
(13) 
10 
(25) 
22 
. (22) 
36 
22 
4-0 
98 
20 "clutches" were checked for stage of incubation by candling. 8 of 
10 2-egg "clutches" were incubated while only 1 of 10 1-egg "clutches" was 
incubated. This results in a mean clutch size of I .89 for 9 clutches 
known to'have been completed. 
Pair-data were obtained for 14*2 birds, of which 88 were prenesting 
birds roosting together and 54- were birds with active nests. 
No clubs 5 subadult, or immature birds were seen by me nor do I re¬ 
member any other members of the field party stating that they had seen 
any. Of the 14-6 returns, 14-2 had been banded on Lisianski and 4- had been 
banded on Laysan, one of them as a Laysan Albatross. Three of these birds 
were roosting with Lisianski-banded birds and the fourth was paired with 
a bird with one egg. 
-"'"'I; K. 
Brown Booby 
Estimated population 
Breeding status - 
c. 20 
Unknown 
On the afternoon of the 20th and the morning of the 21st I counted 15 
Brown Boobies roosting on the reef rocks of the east side of the island. 
Fourteen were adults and one was an immature or subadult. During my noc¬ 
turnal survey of the island perimeter I found none roosting in other areas. 
No one in the survey party visited the breeding area in the southwest 
interior of the island where nests were found in September 1967 * Hence, I 
do not know whether any of the birds seen were breeding or not. 
Red-footed Booby Estimated population - c. 250 
Sample nest count results: 
# of nests counted ---- 16 
j # of empty nests'--- 11(69$) 
# of nests with•"egg ---- 5(3^-$) 
# of nests with young -- —- none 
Although just beginning to nest, the breeding cycle of the Lisianski 
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