THE OOLOGIST 167 



Mi&RATlON Of OUVE- Backed Thrush. 

 ConditiorivS: Weilxer Clear. THermomeXer 54° 2>aroTTieter 2.o,^05S- 



-i 



3ircls WHICH "Passed THrouS>M QivtK /\rea Op 

 ^Kvj^ BetwecTu 5 A.m. Anci 6 A.m. 



Migration of Olive Backed Thrush, Sept. 16, 1912. Drawing by P. G. Howes. 



