ADDITIONAL MATERIALS NOT FORMERLY EXTRACTED _ (RBC) 6/10/65 
HOWLAND ISLAND 
LESSER FRIGATE 
Birds-Annotated List 
October 10, 196*1 ---- HACKMAN __" Yesterday,.. 
• * * 5 
5 
all of the Lesser Frigate nestlings that were blood sampled 
regurgitated great quantities of equally fresh squid,(to 
those regurgitated by Blue faced Booby.) The frigates were 
worked between 4 and 7 p.m. 
Before heading out to the ship (at 0900) I watched the 
large circulating feeding flock that has been following 
the tuna school. The feeding flock was composed of 
Brown Boobies, Blue-faced Boobies, Sooty Terns, Red-tailed 
Tropicbirds, and both species of frigate. Chasing by 
frigate noted as follows (observations made at a distance 
of 1/4 to 1/2 mile) 
1 female frigate (Lesser??) chasing Sooty Terns - no success 
2 female (Lesser ??) and 1 male Lesser Frigate chasing 
a Sooty Tern that had just splashed. All three pounced 
after something on the water and the male Lesser apparently 
won out becauue is was chased by the two feamels for a 
short distance. " 
October 11, 196*1 ---- Hackman -- "Lesser Frigate nestlings 
y still regurgitating large quantities of fresh squid. 
v (Probably observation made in afternoon between 1200 and 
1500 - SBC) 
October 12, 196*1 ---- Hackman -- "The following Frigate-chasing 
observations were made at 1140 (Over a scholl of tuna 
offshore) 
3 male Lesser Frigates chasing a Sooty Tern - no success 
2 Lesser (couldn,t tell sexes chasing a Sooty Tern-no success 
1 male Lesser chasing a Sooty Tern - no success. 
A considerable amount of competition exists between the 
Lesser Frigates in a feeding flock. Birds that were 
successful in capturing prey were invariably chased by 
several of their neighbors. About 1/2 of these chases 
appeared to be successful. These observations were made 
at a distance of 1/4 to l/2 mile, as the feeding flock 
moved south along the west shore. " 
October 9, 1964 ---- Anderson -"Frigates in a band about 100 
feet wide by 1000 feet long " 
October 9, 1904 ———— Merrill —— 'About 1330 a female Lesser 
Frigatebird was observed chasing an adult Blue-faced 
Booby. The chase continued for approximately 15 minutes 
y without any success on the part of the Frigatebird." 
