c? v »* wv^. 'C* V 
Reproduction: This species nests QEB±y in the groves of Cordia and Tournefortia 
trees on the southeast and west sides of the island. There are six groves 
of Cordia trees and one of Tournefortia at the southeast end of the island, 
a large grove of Tournefortia trees on the west side a mile north of the 
lighthouse hereafter referred to as the "frigate colony", and finally a 
small dense grove of Cordia by the "guano hill". In May 1965 almost iden¬ 
tical proportions of the nesting population were found in each of the three 
areas and it would seem these proportions are probably consistent from year 
to year. An occasional bird nests in the dead Cordia feree near the colon¬ 
ist s w installations. 
Within the "frigate colony" there is partial segregation of the booby 
and Great Frigatebird nest sites. The boobies are concentrated in a few 
peripheral areas and only an occasional bird nests in the interior of the 
grove. In the Cordia groveswhere the Great Frigatebirds do not nest the 
booby nests are more numerous. 
Although only about a quarter of the population nests in the "frigate 
colony" about half of the Red-footed Bobbies roost there, particularly the 
immature and subadult birds. Results of banding and recppture indicate 
there is considerable mixing of birds between the different colonies. 
\l3tfi H(p 
Banding : 3rbO& adults, £hre subadults, immatures and nestlings 
harve—be^n banded through j£Hae^l965- Recapture data indicate considerable 
movement of Enderbury birds within the Phoenix Islands (particularly to 
McKean) and limited movement outside this area (i.e., over 500 miles). 
Birds have been recaptured on Phoenix ^ McKean Howland Jarvis 
Qyf, Tong are va (land Pukapuka, Cook Islands In addition birds banded 
. y / t) 0. fW / 
on Phoenix McKean {/&) 9 Howland (^T), Jarvis f, Malden 
Y ^ , ! p 
(l), and Palmyra (*) Islands have been r ccp t ur e- ff on Enderbury. [^A preliminary 
examination of the data suggests that there is more interchange of Ender¬ 
bury birds with Ms birds from McKean than one would expect taking into account 
the distance and size of the populationTj Recaptures of Red-footed Boobies 
from Palmyra and Malden (both over 1000 miles from Enderbury) and other dis¬ 
tant islands tends to indicate there is some exchange of birds between all 
south central Pacific Red-footed Booby populations. 
