This afternoon (4:15-50pm) I found a MEW GULL at South Platte Reservoir (Arapahoe). This very well may have been the same bird that Suddjian found there on 1/9, but, given the size of the gull flocks moving about recently, it could very possibly be a different individual. Regardless, there are certainly plenty of goodies in the South Denver Metro area right now, and we've probably only really gotten good looks at a fraction of them. Thayer's, Lesser Black-backed etc. also represented, but no Glock or Glock-winged. No Yellow-legged either.
Best,
Alec Hopping
Littleton CO