I 
Bumm 'S PETREL (Bulveria bulwerii ); At-Sea Distribution and Abundance 
Tiie following maps represent, all At-Sea observations made bv 
• •. r 
personnel of the Pacific Ocean Biological Survey Program from February, 
1965 , through August, 1965, 
Each square represents one days observation from the first through 
. - - 
the fifteenth of the month, while each eircle represents one days 
observation from the sixteenth through the thirty-first of each month* 
Numbers reier to the actual number of birds observed during the day. 
Color code: 
yellow « 0 birds 
green «= 1-10 birds 
blue = 11-50 birds 
red m 51-100 birds 
brown « 100+ birds 
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