Cct\9-13* 1964—SIBLEY summary - 50 rest with 1 egg* 85 with 2 €gg@* 81 with small 
% 
young* 16? vdth large young# 416 adults* 61 euba&ults* 55 immatures and 
172 nestlings handed. 814 returns# 1 adult collected as skeleton# 10 blood 
samples takem. Estimated 3000 birds present 
Oct. 12* 1964 
3 eSS esss < 
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Et 
£ f 
Sibley : Nest protection by a pair observed this morning on east side 
of island# Nest with one egg was located just in front of large roosting 
club and as we banded the club# tended to overran the nest area. The parents 
diverted this flow around nest (see diagram). The most unusual aspect of the 
defence was that both birds had their bodies pressed flat against the ground 
and merely swung their bills around [the usual defense is to charge the of¬ 
fender!) toward the advancing bird 
Four large clubs* 300-500 birds each 
flew at the slightest disturbance. Nestlings banded 3 months ago have bands 
heavily encrusted with guano up to thick# Birds with clean bands are 
fully fledged as the guano quickly washes off when they first fly to ocean# 
ADDITIONAL MATERIAL NOT FORMERLY EXTRACTED _ (RBC- 6/10/55) 
HOWLAND ISLAND 
Birds - Annotated List 
BLUE FACED BOOBY 
(See Also - Additonal Material - Lesser Frigate) 
x 
October, 9, 1965 --— Hackman -- " Several of the first Blue 
faced Boobies encountered regurgitated very fresh squid. 
The eyes and tentacles had not been digested at all. This 
is the first time that I have seen fresh squid (or any 
squid for that matter) from Blue-faced Boobies. Chances 
are this is what the tuna had been feeding on. (Noted 
while walking island circuit, about 1030 A.M.) (RBC) 
“Some (Blue-faced boobies) are on newly hatched chicks. 
One nest contained a pipped egg and was marked with a 
tent pole so that it could be found readily later. The 
hole in the egg was 5 mm. across. 
October 10, 196^ ---- Hackman -- i! Before heading out to the 
ship I watched the large circulating glock that has been 
follwoing the tuna school.. .Tfct. ., The Blue-faced Boobies 
___XC” were diving from a height of 
from 5-20 feet. One plunged in from a low altitude sat 
for a moment, arose and flew about ten Beet, very low, 
and plunged in again. This performance was repeated several 
times. _ __ _ ' _ 
