Glaucous winged gull

I took these pics on the way back from the pelagic tour. The gulls were attracted to the boat by the popcorn "chum" that was being tossed from the back of the boat. The glaucous-winged gull is a very large duck with no black on its wings. See how big the glaucous-winged gull is next to the Heerman's gull in the lower picture.