Yellow-rumped Warbler
I saw a Yellow-rumped Warbler, like the one in this USGWS photo, today in the Florence area. Though it may seem strange to have warbler in Colorado in November, much of SE Colorado is sufficiently mild that a few of these tuff warbler species actually winter-over.
Other birds seen in that area included a Hairy Woodpecker, a few Black-capped Chickadees and large numbers of Robins.
SeEtta