International Symposium and Workshop on the Conservation of the Eastern Massasauga Rattlesnake Sistrurus catenatus. When a female Massasauga rattlesnake is ready to mate, she has a special way of announcing it: she sheds her old skin, which releases a special chemical that attracts males. Eastern massasauga rattlesnake at Lincoln Park Zoo. Small to medium rattlesnake that unlike most rattlesnakes, has 9 enlarged scales on top of the head. It is Ontario’s only venomous snake, though it will only bite in self-defence if it is threatened or harassed. The Saint Louis Zoo is doing its part to help eastern Massasaugas. Copyright © 2010-2013 Matthew B. Marsh. A large rocky crevice, for instance, can hold a lot more snakes than an abandoned crayfish burrow -- both popular winter dens for Massasaugas. They spend some time sunbathing and shedding last year's outer skin, then begin their annual migration to their summer hunting grounds. While they have much in common, the three subspecies all look a little different. When a female Massasauga rattlesnake is ready to mate, she has a special way of announcing it: she sheds her old skin, which releases a special chemical that attracts males. Envenomation can … A dark bar extends from eye to rear of the jaw. Eastern Massasauga Rattlesnake. They are often confused with some non-venomous snake species like the eastern milk snakes and fox snakes. Baby Rattles. It is brownish with saddle- or butterfly-shaped darker brown blotches on the back that alternate with smaller blotches on the sides. Depending on how much sunbathing she does, the pregnancy can last anywhere from two to four months. Eastern Massasauga Rattlesnake. Apr 20, 2017 - Eastern Massasauga is a poisonous species of Pitviper snakes mainly found in different regions of United States. The snakelings are about nine inches long at birth, and are somewhat paler than the adults. Rattlesnakes can be found all over the US because they are very adaptable. The eastern massasauga rattlesnake averages 20 to 30 inches in length. Eastern Massasauga Rattlesnake species information on herpman.com. In the spring, the snakes come out of their dens. Populations of this snake have declined so much that it is now necessary to work to conserve it or it could go extinct in the future. There are three recognized subspecies of this species. It is Michigan's only venomous snake, and one of only two rattlesnake species that occur in the Great Lakes region. The Eastern Foxsnake and the Milksnake are non-venomous snakes that mimic the rattlesnake by quickly vibrating the tip of their tails when threatened. See more ideas about rattlesnake, snake, poisonous snakes. Two Michigan residents were bitten by a rare rattlesnake in one month, an incident the Department of Natural Resources says is unusual. Fair use (quotations, etc.) Unlike many other species of snakes, Massasaugas often migrate. In the fall they move to lower, wetter habitats, where they brumate in shelters during the cold winter months. The Massasauga rattlesnake is now a candidate for federal listing under the United States Endangered Species Act. (We have the first two types at the Saint Louis Zoo.) J. Wildl. Yes, There Are Rattlesnakes In Georgian Bay Islands National Park! The massasauga (Sistrurus catenatus) is a rattlesnake species found in midwestern North America from southern Ontario to northern Mexico and parts of the United States in between. This tracking study, combined with other ongoing research, will help us develop a conservation plan to maintain Massasauga populations at Swan Lake. The eastern massasauga rattlesnake (Sistrurus catenatus catenatus) is listed as threatened or endangered in ten of the eleven states and provinces in which it currently is found. 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