The Carolina Chickadee is a common bird in the Southeastern United States. I photographed this one in Shenandoah National Park but we get plenty of them visiting our backyard bird feeders throughout the year. They are gregarious, often congregating with Titmice, vocal, and pretty acrobatic. As you can see in this photo, they frequently hang under branches to find food.
Carolina Chickadees are also quite small. According to allaboutbirds.org they only weight between 0.3-0.4 oz (8-12g). Every winter, when it gets really cold I wonder how they survive. Thankfully they do.