Where is the Giant Garter Snake found? DRAFT RECOVERY PLAN FOR THE GIANT GARTER SNAKE (Thamnopsis gigas). The Giant Garter Snake Recovery Team. Endemic to North and Central America, species in the genus Thamnophis can be found from the subarctic plains of Canada to Costa Rica.The common garter snake (Thamnophis sirtalis) is the state reptile of Massachusetts.Garter snakes vary in length … As with many snakes, the female giant garter snakes tend to be longer and larger than the males. The giant garter snake was referred to the species Eutaenia hammondii by Cooper (1870) . The giant garter snake is one of North America's largest native snakes, reaching up to 64 inches in length and endemic to California's Central Valley, where it originally inhabited natural wetlands. These shy snakes require pools of water to both hunt prey and escape predators. Since then, its taxonomic status has been revised several times (Ruthven 1908, Van Denburgh and Slevin 1918, Fitch 1940, 1948, Fox 1948) . In colder temperatures, the snake goes underground and becomes […] It uses venom to help capture its prey, but that venom is harmless to people. Though their bite might produce an unpleasant reaction in … The giant garter snake, Thamnophis gigas, is a threatened species endemic to California's Central Valley. Fitch (1940) described it as a new subspecies Thamnophis ordinoides Giant Garter Snake Amazing Facts When disturbed, the Giant Garter Snake emits a foul-smelling musk from its cloaca. The scaly skin color can be brown, black or olive with checkered pattern or yellowish stripes. The giant garter snake is the largest species of garter snake, with the adult snakes ranging from 94–165 cm (3.1–5.4 ft) in length. Garter snakes have toxins in their saliva which can be deadly to their prey. We sampled 14 populations throughout the current geographic range of T. gigas and amplified 859 bp from the mitochondrial gene ND4 and one … The giant garter snake is not dangerous to humans. Giant Garter Snake Exam. We tested the hypothesis that current watershed boundaries have caused genetic differentiation among populations of T. gigas. In fact, it is endemic to this area, found nowhere else in the world. This snake lives in wetlands of the Central Valley of California. Fish and Wildlife Service (1999) Glenn D. Wylie and Michael L. Casazza. The giant garter snake is the largest species of garter snake, ranging from 36 - 65 inches in length. One of the scarier snake facts: Located in the Cerrejo mines of Colombia, the Titanoboa was the biggest snake fossil ever found. - Garter snakes colors vary from green to grey to almost black, but regardless of … The largest garter snake in the world is Thamnophis gigas, the giant garter snake. Unfortunately, giant garter snakes are threatened, with only five percent of their historical habitat remaining. - Garter snakes are among the most common snakes in North America. U.S. The giant garter snake is among the largest snakes in North America. The 60 million-year old fossil measured up to 50 ft long, weighed 20 times the average person, and consumed a diet of crocodiles and giant tortoises. Investigations of Giant Garter Snakes in the Natomas Basin: 2001 Field Season. The neck is narrower than the head. Giant garter snakes are the largest of the garter snake species and endemic (native) only to central California. Distinct stripes can be seen on snakes at the northern end. USGS-BRD, Western Ecological Research Center Dixon Field Station Garter snakes are usually 23-30 inches long but have been know to grow up to 53 inches long. Garter snake is a common name for generally harmless, small to medium-sized snakes belonging to the genus Thamnophis. In length the biggest snake fossil ever found northern end emits a foul-smelling from... Caused genetic differentiation among populations of T. gigas RECOVERY PLAN FOR the giant garter snake emits a musk. 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