ELDERBUEI ISLAND 
DRAFT 
BIRDS 
from month to month and as shown above are composed mainly of birds from other islands 
As has also been shown above and confirmee!, by large scale banding* only a fraction 
of the club birds are ashore on any given night. Judging from the banding data 
given earlV this club population number about 2,000 to - 2,-500 * If this club is 
composed entirely of Enderbury Island birds and vie assume a production of 300-400 
fledged 
/(young a year it would represent at least 6 years production. Only continued 
data collection on young birds will reveal how long It is before they return 
to the island to breed. By using band data we do not get a clear picture of the 
actual composition of the clubs. A-& The club is composeed of young birds from 
Enderbury* young birds from other islands and adult birds from other Islands. 
presumably 
The young birds from other islands are^matched by bird on the other islands which 
have come from Enderbury. The adult birds are not allowed for In this way since the 
adult population on Enderbury lias been calculated differently that the club 
population and takes into account the birds which are not present. Therefore any adult 
from mother Island increases 
bird which is banded on Enderbury 44«the figure for the size of the 
floating population of young birds. If 4h<@ adult birds make up any sizeable 
proportion of the club population our figure for the size of this population will 
be to high. We do not believe that this is true because of the data in table . 
ANNUAL CYCLE: 
