I am trying to find out which animals are native to the City of Philadelphia. From my own experience I know that the ground species are gray squirrels, raccoons, opossums, field rats, field mice, deer, rabbits, garter snakes, groundhogs, and chipmunks.
Online I found that the PA Game Commission has held seminars this summer to discuss animals native to this area. I know the game commission officer who led the workshop, so I plan to contact him for details.