Poecile carolinensis
Order Passeriformes
Family Paridae
Very similar to the Black-capped Chickadee but they don’t overlap except in a very narrow hybrid zone from New Jersey to Kansas. North of that line it’s a Black-capped area, south of that line it’s a Carolina Chickadee zone. It also seems that that hybrid zone is slowly moving North every year. https://www.audubon.org/news/identifying-black-capped-and-carolina-chickadees