Greetings: I have consulted the books, GULLS, by P J Grant, and SEABIRDS,by Peter Harrison, and both books giver interesting comparison of these two birds and how they may be confused in identification. I am sure other birders have referred to these two books too. It would be nice if someone could get a better photograph of the bird so we could have better comparison. Thanks to Paul Pedersen for his photographs. Forest Strnad Faribault, MN.
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