This first-cycle bird (probably a male due to relatively large size) was present on 1 Jan 2012 (Loveland Christmas Bird Count) at dawn at the Carter Lake gull roost (seen by Cole Wild), then at 7:30 am on the ice at Lake Loveland by me (with Tom Hall and Josh Bruenning). I took these photos later in the morning at the Larimer County Landfill (about 11:30 am). I believe the same bird was photographed later in the month in Broomfield 30 miles further south, with an adult Kumlien's Iceland Gull (see https://pbase.com/gwalbek/kumliens_icgu).