Grey-headed Gull
10,000 Birds
AUGUST 6, 2011
The ABA is still considering its response to the gull and its provenance, but more to the point, Jochen has called its pedigree into question by asserting that it is a Ring-billed Gull x Black-headed Gull hybrid. This one has not yet taken the grey head of the breeding bird. Interestingly (credit must go to David J.
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