Thayer's Gull (3rd cycle)
Glaucous Gull (adult) and Thayer's Gull (2nd cycle)
Herring Gull (1st cycle) and Thayer's Gull (2nd cycle)
Laughing Gull (basic adult)
Glaucous Gull (1st cycle, probable barrovianus)
Thayer's Gull (basic adult)
