Tuesday, 30 April 2013

[cobirds] Gull ID Question - Cherry Creek SP, CO - Arapahoe County

I saw a gull today off of the bird observatory platform that I am not sure of the ID.
Definitely larger than the Ring-billed Gulls it was near, and it seemed larger than the California Gulls that were farther off along the shore. It didn't see quite big enough to be a Herring, but size can be deceiving.
 
I have three sad little pictures here if anyone wants to give me their thoughts.  I'm going to keep my thoughts of Juvenile Thayer's to myself so I don't sound overly stupid. 
 
 
 
 
John Breitsch
Denver, Colorado

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