The eastern massasauga rattlesnake (Sistrurus catenatus catenatus) is a unique and fascinating part of Michigan's natural heritage. -Western Diamondback Rattlesnakes can live to over 20 years.-These rattlesnakes use venom to immobilize their prey that includes birds, reptiles, and small mammals. Some reach 8 feet in length and weigh up to 10 pounds. Following a gestation period of 4-5 months, females give birth to 4-14 (average 9) young every three to five years between late August to mid-September. Females seek burrows or hollow logs to give birth to between 6 and 21 young. The average lifespan is between 13- 18 years old in captivity and 10 – 15 years in the wild. They actually give birth to live young. Some snakes are immune to the poison of rattlesnakes. The average rattlesnake can live 15 to 20 years. As they often live in disguise to hunt prey, humans sometimes inadvertently end up stepping on them. The pupils of the eyes are vertically elliptical. Full grown rattlesnakes can range from 3 to 7 feet in length. Rattlesnakes do not lay eggs in nests. Rattlesnake Reproduction. With proper medical care, snakebites are normally cured and patients can recuperate. Newborn diamondbacks are 12-15 inches long and resemble their parents, except their tails end in smooth buttons rather than rattles. The venom is mainly hemotoxic and attacks the victim’s blood system.-Western Diamondback Rattlesnakes have heat As with most reptiles, snakes live a long time compared to dogs or cats. Although rattlesnake bites are dangerous, the recorded fatality rate from their bites is quite low. This type of reproduction is known as ovoviviparous. Timber rattlesnakes are viviparous, meaning they give birth to live young. Most snakes are relatively small, about a meter long. Prairie Rattlesnake . Rattlesnakes are very long-lived—about 15 to 20 years, or more—relative to their body size because they’re really good at conserving energy. Characteristics The Prairie Rattlesnake (Crotalus viridis) is a venomous pit viper with a diamond shaped head on a relatively thin neck.This leads to a fairly heavy body that can grow to five feet in length. All rattlesnakes are ovoviviparous, meaning their eggs hatch inside their body and they give birth to live young. The extinct snakes of Titanoboa cerrejonensis were 12-15 m in length, but to date the longest reptile mesh python is about 10 m. On the other side of this line is a 10-centimeter crumb of Leptotyphlops carlae. Each distinct species has its own range. The eastern diamondback rattlesnake is the largest venomous snake in North America. There are 36 identified species of rattlesnakes as of 2014. It is Michigan's only venomous snake, and one of only two rattlesnake species that occur in the Great Lakes region. A rattlesnake can move the rattle on its tail back and forth 20-100 times in just one second. This largely varies depending on which type of snake it is. 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