Incidentally, the word "eastern" in a bird's name almost always means east of the Rocky Mountains.
Are you like me - sometimes forgetting where you put the car keys and so on? Maybe we sometimes share a trait with Chickadees. In a study of Black-capped Chickadees, the area of the brain used to process spacial information like where we left things (the hippocampus) varies in size during a typical year. It enlarges in the fall and winter, coinciding with the birds' seed-caching and -finding activity. It shrinks in the spring, when feats of memory are no longer crucial.
By the way, the species of Chickadee found here in north Texas is the Carolina Chickadee.