RED-TAILED TROPICBIRD 
Annotated List 
LISIANSKI 
v 
LS# 22 -- March 20-21, '68 (RBC Kept.) 
Red-tailed Tropicbird 
; 
, I 
Estimated population --- 
Breeding status: only nests with 
eggs found. 
c. 100 
Red-tailed Tropicbirds were low in numbers, a maximum of 10 birds 
having been seen in display over the northwest corner of the island at 
1355 on the 20th. I found only about 5-6 birds down on the ground on 
the northwest corner of the island, either under Scaevola or mixed 
Scaevola and morning glory. Only two occupied nests were found by me 
and both contained eggs. 
(RBC notes) 
jiin iTiTirfin 
March 20-21 Lisianski Island, Hawaiian Leeward Islands 
Estimated population 
c. 100 
ir>. n 
March 20: Counted 10 Red-tailed Tropicbirds in the air 
over the northwest corner at 1355. During the morning pm 
I checked four tropicbirds down on the ground and found 
that two had eggs. One of the nests with eggs was under, 
a clump of Scaevola near the camp, the other was under 
mixed Scaevola and morning glory on the northwest corner 
of the island. This area of the island, the only one 
where I dd any detailed checking for nesting status had 
very few birds. The only other birds down were also 
under Scaevola on the beach crest. It seems likely to 
me that the species has only just begun to breed and 
that populations are far from their maximal levels. I saw 
only relatively few tropicbirds in the air at about sun- 
noon when I would have expected maximal numbers to be 
displaying. The single egg measured was 64.1 x 46.5 mm. 
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