Thursday, 10 January 2019

[cobirds] 2nd winter Glaucous-winged Gull (?) South Platte Reservoir (Arapahoe county)

Hi all -


I saw this bird back on the evening of Tuesday, the 8th, sorry for the late notice. At the time I had assumed it was an immature Herring or Thayer's Gull. I am not good at IDing immature gulls, so I uploaded some pictures to a Whatbird ID forum. To my suprise, a moderator responded that it could well be a Glaucous-winged 2nd winter. This bird was on the ice with Ring-billed, Herring, and a Thayer's Gull. Female Black Scoter was also present. Since it is a rarity in Colorado, I was just hoping for a confirmation or rejection on the Glaucous-winged ID before I enter it as such into ebird. Here are a couple photos: 


IMG_7604 - Edited (3).jpg



IMG_7605 - Edited (5).jpg


Also, here's a link to my ebird list, with more pictures of the possible Glaucous-winged Gull, as well as some pretty good pics of the Black Scoter: 


Ben Sampson
Centennial, CO

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