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WHITE- RUMPED STORM PETRELS ( Oceanodroma leucorhoa + 0. castro ) 
At-Sea Distribution and Abundance. 
The following maps represent all At-Sea observations made by- 
personnel of the Paciiic Ocean Biological Survey Program from February, 
1963 , through August, 1965 . 
Color code: 
Green = refers to numbers of birds (1-9) 
Blue = refers to numbers of birds (10+) 
Red = refers to group of ca. 100 found around a dead whale. 
