Below is a working checklist of Mount Desert Island's reptiles. For more information about a particular species, click on the link under the heading "common name".
Please send corrections and updates to info@vfthomas.com. Photographs are welcome. Thank you.
| Order | Family | Genus | Specific Epithet | authority | common name | Sources (full citations given after this table) |
| Testudines | Chelydridae | Chelydra | serpentina | (L.) | snapping turtle |
Bar Harbor: Champlainer (DL); Hunter et al. (1999) p. 222. Mount Desert: Champlainer (TFV); Hunter et al. (1999) p. 222. |
| Testudines | Emydidae | Chrysemys | picta | (Schneider) | painted turtle |
Bar Harbor: Champlainer (TFV); Hunter et al. (1999) p. 223. Mount Desert: Hunter et al. (1999) p. 223. Tremont: Hunter et al. (1999) p. 223. |
| Testudines | Emydidae | Glyptemys | insculpta | (LeConte) | wood turtle |
Mount Desert: Hunter et al. (1999) p. 224 (as Clemmys insculpta) |
| Serpentes | Colubridae | Diadophis | punctatus | (L.) | ringneck snake |
Bar Harbor: Champlainer (DL); Hunter et al. (1999) p. 226. Mount Desert: Hunter et al. (1999) p. 226. |
| Serpentes | Colubridae | Lampropeltis | triangulum | (Lacépède) | milk snake |
Bar Harbor: Champlainer (DL); Hunter et al. (1999) p. 226. Mount Desert: Hunter et al. (1999) p. 226. |
| Serpentes | Colubridae | Opheodrys | vernalis | (Harlan) | smooth green snake |
Bar Harbor: Champlainer (TFV); Hunter et al. (1999) p. 227. Mount Desert: Hunter et al. (1999) p. 227. Southwest Harbor: Hunter et al. (1999) p. 227. town(s)?: Champlainer (STG) |
| Serpentes | Colubridae | Storeria | occipitomaculata | (Storer) | red-bellied snake |
Bar Harbor: Hunter et al. (1999) p. 228. Mount Desert: Hunter et al. (1999) p. 228. Southwest Harbor: Hunter et al. (1999) p. 228. |
| Serpentes | Colubridae | Thamnophis | sirtalis | (L.) | common garter snake |
Bar Harbor: Champlainers (TFV, ECW); Hunter et al. (1999) p. 229. Mount Desert: Hunter et al. (1999) p. 229. Tremont: Champlainer (TFV) |