CLOSED: Chickadee, Chickadee, What???

This little guy has me completely baffled. He moves so fast, it was difficult to get a clear shot. Somebody please help me.

Red-breasted Nuthatch

Nice one to see!

Resin

Yep, I just got a Cornell Feeder Watch report which featured this bird as having increased in numbers in the Northeast. I live in Denver, and had never ever seen one. Now there's a flock of them, competing with the Chickadees for treats. Very hyper little guys, and fun to watch. Thanks!