Yellow legs?

Yellow legs?

Observation - Yellow legs?. Description: I just assumed this was a herring gull, but after winding the exposure and vibrance up a bit... began to wonder if those legs don't look a bit yellow. It's another lousy photo, and I'm probably guilty of erring against probability in the face of uncert

I just assumed this was a herring gull, but after winding the exposure and vibrance up a bit... began to wonder if those legs don't look a bit yellow.

It's another lousy photo, and I'm probably guilty of erring against probability in the face of uncertainty, (again), but other than the legs I don't know any other characters that separate these species.

Larus optimisticus?