Last weekend, I saw a very small turtle on a path by a pond (central NJ). It was about the size of a quarter- black on top and bright orange underneath. The edge of the carapace viewed from underneath was orange with some dark striations. Since this was so small, was it a hatchling? Was it a a painted turtle? I would recognize an adult, but I have never seen eggs hatch and I have never seen a turtle this small(!), except maybe some baby terrapins in a tank at a zoo. Thanks for any help on the species.