Identify a bird that you saw in Pennsylvania. Mute Swan: Aggressive bird, entirely white, orange bill with large black basal and black lores. Curved . - The Black-capped Chickadee is a common songbird of Pennsylvania and the Northeastern United States. Birds in Your Backyard. American Goldfinch. American Robin. Baltimore Oriole. Black-Capped Chickadee. Blue Jay. Chipping Sparrow. Dark-eyed Junco..