Ludwig, JP 
(In my opinion they are a core adequate size than No 5 size), and 
exhausted our field supply of 189 5's and 100 Vs on the population. 
Today we could have handed at least 500 if we had brought the bands. 
The fact that no recoveries vere made on birds banded last fall suggests 
strongly that the birds banded today will finish breeding by September. 
Sooty Tern Banding was very difficult ~ all birds were netted 
from the air and consequently the low number of 211. This population 
is separated into a number of veil defined pockets and the nesting 
within these pockets i® much less dense than at Johnston. My population 
estimates for this species and the others are accurate, I believe, to 
25 percent or better. The criterion of 50 percent outlined in the 
' 
Circular Letter No. 4 are inappropriate here. These estimates are 
not guesses but are based on careful estimates of the individual 
pockets of breeding. Hot all of the birds are breeding yet and I 
expect 50-60 M pairs to be present by April 20. 
Only one other species was noted on Manana by me •• a Sanderling 
on the rocky shore. 3 Rabbits were seen - 1 was killed. 
Behavioral Notes : 
Sooty Terns - Today I distinguished 4 voices used by this species, 
1) the familiar 'blatter" call, 2) A moaning given when being handled, 
5) a rattle given when their nest was approached, and a soft grunting 
sound given when 2 birds were fighting. 
Common Noddies: 
Courtship Flight(?) - Begins low over either land or water. Phase 1 - 
