and some were down on the ground. Kenyon investigated this area on the 
21 st and reported that he found no nests vith eggs. 
Brown Noddy Estimated population-■-c. 100 
Breeding status: At least a few eggs present. 
I saw very few Brown Noddies, either by day or by night and found no 
evidence of nesting. Kenyon reported a small colony with 5 or 6 eggs in 
the north-central portion of the island near a frigatebird colony. 
Black Noddy 
Estimated population -- c. 
Results of sample nest count: 
# of nests with contents counted 
# of nests with eggs - 
fl of nests with small downy young 
# of nests with medium sized young 
# of nests with large young —•— 
No. Banded ---: 32 (20 A-U, 14- N-U) 
No. Returns 1 (A-U) 
500 
156 
105(67/0) 
30(19/) 
10 ( 6/) 
ll( 7/) 
Black Noddies were evidently near the peak of nesting as many active 
colonies were found in the northwest corner of the island. On the whole* 
the population appeared to be at least several weeks ahead of that on 
Laysan. Thirty-two percent of all nests counted on Lisianski had young 
whereas on Laysan only 12 percent had young. 
This difference in the progression of the breeding cycle was also 
supported by flotation tests to determine the stage of incubation of eggs. 
Of 30 eggs tested on Lisianski, 1 (3/0 was fresh, 1 (3/0 was very slightly 
incubated, 6 (20$) were slightly incubated, 7 (33$) were moderately incu¬ 
bated , and 15 ( 50 $) were heavily incubated giving a total of 26 percent 
fresh to slightly incubated eggs and 73 percent moderately or heavily incubated 
eggs. In a sample of 25 eggs tested by flotation on Laysan 63 percent were 
very slightly or slightly incubated and 32 percent were moderately or 
heavily incubated. , r 
My observational data not surprisingly also indicate that the larger 
colonies had been longer established than were the smaller colonies. The 
number of empty nests seen suggests that egg-laying was still proceeding 
and it seems likely that nests were still being built although I saw no 
birds carrying nesting material. 
The single return obtained had been previously banded on Lisianski. 
White Tern Estimated population ----- c. 100 
Breeding status: no eggs or young 
found. 
No. returns --'- l(A-U) 
White Terns were scarce on Lisianski, the maximum concentration seen 
by me consisting of about 10 birds that were present in the northwest 
