EEDERBURY ISLAM) 
BIRDS 
D IA F T 
14 
e number of Immature birds varies with the season but the total 
reduction of immature b irds for the year is probably a round 300-400. 
,11^-HelTrbs^ ■ from he pr c eeed l ng—page 
J^Tf. - P.n m pn.qpH mq i n 1 y /if hi T»r1rr ■ Prrrrr rn t i,1 ih r g . A s has also bCTdll bllO ' wTT 
cvvrdb—-— 
adg^rrronrirmea by largg^g- eale ■ -ba Tidtrrg, o nly a fraction of the ofnb birds —- 
t 
are-~ a sh or e---Qnr-^any give -n-a-Ighf-;— Jw i npng fm n t.hp bind ing dak 
*V©1rc^ ^v<?vw V> . y*A» 
this club population numbers about 2,000 to 2 , 500 . j^CFTThis club is composed 
Trelyof Enderbury Island birds and we assume a production of 300-400 
fledged young a year it would represent at least six 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. The club is 
composed of young birds from Enderbury, young birds from other islands 
and adult birds from other islands. The young birds from other islands 
are presumably matched by birds 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 has been calculated, differently than the club 
population and takes into account the birds which are not present. There¬ 
fore, any adult bird from another island which Is banded on Enderbury 
increases the figure for the size of the floating population of young birds. 
If adult birds make up any sizable proportion of the club population our 
figure for the size of this population will be too high. We do not 
believe that this is true because of the data in Table 
