Another thing to keep in mind is that Maine goes by an "unrestricted" species list as far as legal herps go. Anything not on the list requires a permit that is VERY (read: act of Congress) difficult to obtain. The unrestricted list is as follows:

Boa Constrictor (Boa c. constrictor)
Ball Python (Python regius) (CB, due to ticks)
Rainbow Boas (Epicrates cenchrin) ssp
Rosy Boa (Lichanura trivirgata)
Jungle Carpet Python (Morelia spilota) ssp
Children's Python (Antaresia childreni)
Kenyan Sand Boa (Eryx colubrinus loveridgei) (CB)
Rough Scaled Sand Boa (Eryx conicus) (CB)