KED-FOOTED BOOBY 
Annotated List -p.2. 
LISIAESKI 
LS# 9 July 14-17, '65 (BSC Kept) Estimated Population- 500 adults 
200 young 
Blood samples--- 1 
Banded and returned- none 
About as common as on Laysan. Scaevola and other larger bushes were used for 
nesting. There was a tendency for birds to colonize on both islands but 
many nest's were scattered among the frigatebird nests. Young ranged 
from half-grown to fully feathered individuals. 
13 June 16-19. *66 (PCS Kept) Estimated Population ------- 2,000 adults 
1 _. i 
75 young 
Bests with eggs *-—- 50 
Banded ---—--- 27 
Blood samples --- 28 
Returns —------ , 2 (l R&H, 1 S-J 
Most nesting birds were at the north end of the island in Scaevola but 
several huhdred more roosted in scattered groups all around the island 
in highest Scaevola and in the Casuarina trees. Hatching was behind that 
of other boobies -- 33 nests with young and 23 with an egg werb found 
during the 18 June nest count, which was perhaps 40 or 50 percent com¬ 
plete. 
Several immatures, including an orange-streamered one (SandrJohnston) 
were seen with the roosting groups. An adult with^f^esh red paint on the 
breast was iseen near the southwest side of the island 18 June. This bird 
probably had been marked*recently on Prenqh Frigate Shoals. 
Various population estimates i 
Crossin Shelton Balcomb Smith 1 Report 
2,000 1,000 500 3.000 adults 2000 
500 nestlings 75 nestlings 
(RSC summ) I had little chance to actually check the 
interior population. Shelton estimates 1,000 birds with actual nest 
count of ]33 young and 23 nests with eggs. I believe population closer to 
2,000 as the number of roosting birds which come in at night is considerable. 
LB# 17 Oct. 18-20, *66 (KB Rept) Estimated "Population -- 2,500 + 25% 
Banded ----— kl2 
Recaptured --—-— 7 -- 35 
Inter-island------ 29 
Collected ---— none 
Twenty-nine immature Red-footed Boobies were counted during the survey 
of 18 October. An adult count was not tbken. \ Two sub-adult birds with 
orange streamers were sighted on 18 October. Humbers increased at night 
with the influx: of roosting birds. Most of the' birds roosted bn the 3-8 ! 
, I ' ^ 1 
Scaevola that occupies a broad area between the beach and the interior 
of the island. About fifty birds were roosting at night in the'\ Casuarina 
tree clump f in the interior of the islands The population estimate was 
made on the assumption that %e handled about l /5 of the birds 'while 
covering most of the available;, habitat. 
