Canadian Museum of Nature
Canadian Museum of Nature: Gray Ratsnake
Previously known as black ratsnakes, the gray ratsnake is one of the largest snakes found in Canada. Described are its characteristics, young and food.
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Kingsnake.com: Ratsnake
Kingsnake.com discusses the Ratsnake and each of its five subspecies. Select the Texas Ratsnake, Black Ratsnake, Yellow Ratsnake, Everglades Ratsnake, or the Grey Ratsnake to find additional information. Photo included.