I was wondering if someone could help me with a couple of gull IDs.  These 
are both from Aurora Reservoir, where I thought I'd take a look at some of 
the birds seen yesterday.  I'm larus challenged, however, so I could use 
all the help I can get.  
 
The first bird, I'm calling an immature Glaucous Gull.  It is a large bird, 
bi-colored (pink with black tip) bill, pink legs, pale color, whitish 
wingtips, dark eye:
 
http://www.flickr.com/photos/breitschbirding/11057340496/
 
http://www.flickr.com/photos/breitschbirding/11057406753/
 
The second I'm just calling a gull.  I didn't notice any dark or black wing 
tips on this one.  It also seemed bigger than all the birds around it and 
had a slightly less streaked head.  
 
http://www.flickr.com/photos/breitschbirding/11057335046/in/photostream/
 
I apologize for the over sharpening and lack of perfect field mark views.  
There are other shots of these, and one I'm calling a Lesser Black-backed 
Gull.
 
John Breitsch
Denver, CO
http://www.flickr.com/photos/breitschbirding/

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