Sundell, R. A. 
V9%3 -- 50 
against visual estimates. It probably- would not be a sensitive enough 
indicator to be of real value but at least its use could be investigated. 
Prom 10 p.m. to midnight twenty Noddy Terns were banded. 
December 8--A third egg was found in a third nest site in the frigateblrd 
colony. Daring the mid-afternoon a tropicblrd was observed over the 
colony (no aerial display). 
Brown Booby 5 Noddy Tern 500 Ruddy Turnstone 15 
Golden Plover 30 Great Frigatebird 5O0i 25 Red-footed Booby 500± 25 
fsr 
A count of Bed-footed Boobies coming In to roost cm the guy wires 
early in the evening was taken. A substantial increase over the usual 
300 to 400 birds was noted with a total of 650 being estimated. Most of 
thews are adult birds. 
, The frigatebi;rd population using the guy wires for roosting has 
decreased by 150 to 200 birds from the high of 600 to 650 during November. 
This large number may have been due to the presence of migrants from the 
Hawaiian Leewards which used the island temporarily before moving cm. 
If birds had been colored banded car tagged there we might have been 
able to verify this. 
•*- ' 
The third frigatebird egg noted yesterday vat found destroyed. 
Hie egg to adult success ratio for this species must be very low. 
From 11 p.m. to midnight 15 Noddy Terns were banded, 
December 10— A survey of the bird colony was taken between 9:50 aad 
10:30 a.m. 
