I I 1-15 June 
O — 16-31 June 
Q = 0 birds 
® = 1-10 » 
O *=11-25 " 
Q ^26-50 " 
O -51-100 » 
% = 101 - 500 " 
WHITE-BUMPED STORM PETRELS 
( Oceaxiodroma leucorhoa + 0. castro ) 
At-Sea Distribution and Abundance 
JUNE 
0O S CD O O CD OO 
