□ 1-15 December 
O = 16-31 December 
O = 0 birds 
@ = 1-10 " 
O =11-25 " 
O =26-50 " 
O =51-100 " 
11 
WHITE-RUMFED STORM PETRELS 
( Oceanodroma leucorhoa + 0. castro ) 
At-Sea Distribution and Abundance 
DECEMBER 
