ENDERBURY 
T\ 1 * T? m 
biuir x 
BIRDS 
1 
Around the buildings they nest under old drums, wreackage and the house . In 
the interior of the island tM-«"M^M«^^a.lternating layers of hard and soft 
have been exposed 
guano rock fey around the edges of the guano diggings. Weathering has produced 
uneven wear on the different layers and an overhanging ledge has been formed around 
a—lsr3?ge the edge or the central depression. Where the area under this overhang 
is favorable large numb' rs of tropdcbirds wirl nest and one can find a nests 
every few feet along such an overhang. 
Besides these two major nesting ,reas the birds also nests under the 
tree clumps at the south end of the island(but not under those along the west 
side) and under the "houses" built for them. These houses are formed by 
propping up three or four thin slaps of beach rock to form a small shaded 
nest area ith one or two; entrances. The guano workers built a number of these 
but 
and ones built by FOBS? personnel would be occupied by the next nesting season. 
Bandings POBSP personnel have banded 570 adults and ,240 nestlings. None of |iese 
have been recovered on other islands 4<s> through August,, 1965 
Because of the time relationship of POBSP visits and the breeding 
cycle the only period when large numbers of adult birds 4s pr^s-e&t 
have been eaught-and banded or recaptured is ifey and July. 
Therefore almost all the-b&&ded-a?d4u2?R« 77 band returns have been one or 
two years after banding. 
Of the 246 adults banded in July, 1963 approximately 25%> were 
recaptured in July, 1964* An additional 276 birds were banded in July 
1964 making a total of 341 birds handled in this period. 
If we assume random banding in July, 1963 and random recapture in July, 
1964 (both assumtions seem logical from the way the field work was done) 
we can say that approxima tely 204 of the adult birds were banded in July, 
1963 or that 1250 birds u«e~4he were using the island 
