This was another Thayer's-like adult Herring Gull with less black in the primaries than typical American Herring Gulls.
The yellow iris and heavy bill were clues that this was indeed a Herring Gull. We actually found two birds that looked like this on this day (the other was at Michigan City Harbor).
These photos were taken with a Canon Rebel XSi Digital Camera with a 100-400mm zoom lens.
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