flewU*. 1 *ah A (left): S3wvivl history' of five year-o1Ass.. " 
Indoaed bytrpping r~tumo     Graph B3cnr)        Sur~iva4 his.wr 
corre tfor probable b.m  d birds in the uMtpp" portion of tb 
pop4.ation. Orapb C (rigbt)s Survval history of avrag 7arW-clas 
with averag   turnover ras. (Origin of aorrectio     for first two 
yew&ra y**e is shQW  by dtte   limm in Graph A; destination of 
coretinsIn OTaph S.