Ontario
Snakes in Lake Ontario
10 species have been documented here, and none are venomous.
Every snake recorded in Lake Ontario
Common Garter Snake
Thamnophis sirtalis
Harmless
Common Watersnake
Nerodia sipedon
Harmless
DeKay's Brownsnake
Storeria dekayi
Harmless
Eastern Milksnake
Lampropeltis triangulum
Harmless
Smooth Greensnake
Opheodrys vernalis
Harmless
Red-bellied Snake
Storeria occipitomaculata
Harmless
Gray Ratsnake
Pantherophis spiloides
Harmless
Common Ribbon Snake
Thamnophis saurita
Harmless
Western Ratsnake
Pantherophis obsoletus
Harmless
Ring-necked Snake
Diadophis punctatus
Harmless
Compiled from verified GBIF & iNaturalist observations. Informational only.