Help ID Gull?

[clucid77 at comcast.net]

Hello all,
    Pt. Mouilee was great on the 26th. Added 5 new birds between my fiance and I but maybe 6 if someone can help us identify this bird. The picture is poor. I was photographing the Red Knot at the time and noticed this bird in the pic after we got home. Any ideas? Thanks.
  
Chris Mendell(clucid77 at comcast.net)
http://www.grovestreet.com/jsp/onepic.jsp?id=1243830
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