| See comments under previous title.
Seeing the required primary pattern for separating Cory's (borealis) from Scopoli's (diomedea) in the field was very difficult. And these pictures are not entirely conclusive. Although there does seem to be some paleness on the inner webs of the primaries towards their bases, these birds do not exhibit the obvious "black hand" of some borealis. Under the previous title, Ricard Gutiérrez comments that borealis from the Canaries are, to a degree, intermediate between borealis from the Azores and diomedea from the Mediterranean and, in his opinion, these are borealis.
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Cory's Shearwater
Senegal October 2001
