putative American Herring Gull (smithsonianus) adult, Azores, February
2003. Picture: Peter Alfrey.
An example of a very good candidate in the Western Palearctic. Note the pale grey upperparts, flat
crown, long and parallel-sided bill, noticeably small orange gonys spot, greenish tinge to bill base, retained streaking on
the lower hindneck and breast-sides, and the dusky smudge in front of the eye.