(This means they're in a state similar to hibernation, but with periods of wakefulness.) 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. According to the reports of IUCN, these species are in the list of least important. (We have the first two types at the Saint Louis Zoo.) Premium Drupal Theme by Adaptivethemes.com. The venomous Eastern Massasauga Rattlesnake rarely attempts to bite unless highly agitated. Arizona has 13 distinct species of rattlesnakes, which is the highest amount of species in a single state in the entire US. When the mouth closes, the fangs fold back against the roof of the mouth. Johnson, G. 1998. The snakelings are about nine inches long at birth, and are somewhat paler than the adults. And he's just a little guy. The Massasauga rattlesnake is now a candidate for federal listing under the United States Endangered Species Act. Eastern Massasauga rattlesnakes have a potent venom but have relatively short fangs that often fail to penetrate clothing and can deliver only small amounts of venom with each bite. Web page addresses and e-mail addresses turn into links automatically. Although he shakes his tail when approached, a Massasauga Rattler of this size should be old enough for his tail rattle to be readily visible - and milk snakes (who don't have a visible rattle at any age) have been known to mimic the Massasauga's tail movements. A large rocky crevice, for instance, can hold a lot more snakes than an abandoned crayfish burrow -- both popular winter dens for Massasaugas. December 23, 2020 at 1:45 am by . Saint Louis Zoo Institute for Conservation Medicine, From southeastern Canada, across parts of the eastern and middle United States to Arizona, Prairies, meadows, marshes, swamps, floodplain forests, woodlands, desert grasslands. Allowed HTML tags: