Maine is home to a wide variety of wildlife including eight species of turtles, according to the Maine Herpetological Society.
Several are considered common (widespread and not in danger): Eastern Painted, Midland Painted, Northern Snapping, and Musk turtles.
Some are considered of special concern: Spotted and Wood turtles. The endangered turtles are the Eastern Box and Blandings.
According to the Maine Department of Fisheries and Wildlife,
The Department of Inland Fisheries and Wildlife maintains a list of the species that hobbyists in Maine are allowed to keep without a permit. Hobbyists should consult the list before purchasing any reptile, amphibian, fish, bird, or other creature. For a list of Maine’s unrestricted species, please click below: permits through the State. For more information on how to obtain a permit, visit Ownership of any species not on the unrestricted list can result in criminal prosecution. A careful review of the list and permit process is strongly advised.” .See https://www.maine.gov/ifw/fish-wildlife/captivity.html (accessed 7/17/2020)