PUFFINUS PACIFICUS 



APRIL 1965 



MAY 1965 



^9o 



»v 



o 

 OQO 



cRo 



Figure lid. — Distribution of Wedge-tailed Shearwater, April-June 1965. Lines mark the approximate 

 separation between light-phase (open circle) and dark-phase (solid circle) birds. 



32 



