Black-capped Chickadee (Poecile atricapillus)
I have two bird houses in my front yard. Every year Chickadees pick "the red hat" shaped bird house to raise their family. I had fun watching the parents bring grubs to their nestlings although I must admit it wasn't easy capturing pics as they hopped from branch to branch at rapid speed and the the "light" kept changing thanks to the clouds blocking the sun every few minutes.
Two more pics below.