Linda--I also saw a gull like you describe along Port Mahon Road a year ago May. It had me puzzled as well. My first thought was Iceland Gull, but the bird guides didn't support that guess. I finally decided it was probably a partially albino, sub-adult Ring-billed Gull lacking black wing tips and tail, but I'm not a gull expert. Hopefully, others more knowledgeable will comment. Ralph Wall Great Falls, Va.