[EBB Sightings] Presumptive Bonaparte's Gull at Arrowhead Marsh

During this morning's bird count at Arrowhead Marsh, we saw what I think  
was a Bonaparte's Gull (adult non-breeding) in Seasonal Pond # 1 along the 
road  as you enter the park.  
 
The Gull was resting near a single Western Gull and numerous  Mallards.    
It was very small (about half the size of the  Western Gull) with black eyes 
and a clear dark spot behind the ear.  Bill  was thin and black, seemingly 
a bit darker at the tip, and longer than Ross  Gull.   The Gull had a light 
gray back with darker primaries.   Light pink legs.  When it turned its 
head, the upper head looked like it  might have the mottled beginning of the 
typical dark hood of a  Boneparte?s.    I would be interested in hearing from 
anyone who  sees this Gull whether my ID is correct.

Regards,

Jim  Roethe
(925) 254-2190
jimroethe at aol.com
 
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