3 Glaucous, 1 Iceland, 1 Thayer's!! Notice the small bills of the Iceland and Thayer's in comparison to the young Herring at the right edge of the frame.

Here at this one location we had at least the following number of gulls:

Glaucous: 3 adult and at least 8 1st/2nd cycles
Iceland: 1 adult and the 1st cycle pictured here
Thayer's: 1 adult and at least 4 1st and 1 2nd cycle
Great Black-backed: at least 5
Herring: 100's
Ring-billed (the local rarity at the time!!): 2

I will have another gallery with numerous photos of all the above.