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This is the only rattlesnake species in most of the populous northeastern United States and is second only to its cousins to the west, the prairie rattlesnake, as the most northerly distributed venomous snake in North America. [193] [194] No subspecies are currently recognized. [195] [196]
Roughly 7,000–8,000 people are bitten by venomous snakes each year in the United States, and about five of those people die. [4] Though most fatal bites are attributed to rattlesnakes, the copperhead accounts for more snakebites than any other venomous North American species. Rattlesnake bites are roughly four times as likely to result in ...
Like all other pit vipers, it is venomous, with a very toxic bite. [7] C. horridus is the only rattlesnake species in most of the populous Northeastern United States and is second only to its relatives to the west, the prairie rattlesnake, as the most northerly distributed venomous snake in North America.
An estimated 7,000 to 8,000 people are bitten by venomous snakes in the United States each year, with about five deaths. [94] The most important factor in survival following a severe envenomation is the time elapsed between the bite and treatment. Most deaths occur between 6 and 48 hours after the bite.
The blue-ringed octopodes (Hapalochlaena spp.) produce tetrodotoxin, which is extremely toxic to even the healthiest adult humans, though the number of actual fatalities they have caused is far lower than the number caused by spiders and snakes, with which human contact is more common.
The eastern indigo snake was first described by John Edwards Holbrook in 1842. For many years the genus Drymarchon was considered monotypic with one species, Drymarchon corais, with 12 subspecies, until the early 1990s when Drymarchon corais couperi was elevated to full species status according to the Society for the Study of Amphibians and Reptiles, in their official names list.
Eastern diamondback rattlesnake at the Saint Louis Zoo Detail of rattle. The eastern diamondback rattlesnake is the largest rattlesnake species and is one of the heaviest known species of venomous snake, with one specimen shot in 1946 measuring 2.4 m (7.8 ft) in length and weighing 15.4 kg (34 lb).
Studies have indicated these snakes learn to improve their strike accuracy over time. [11] Many temperate species of pit vipers (e.g. most rattlesnakes) congregate in sheltered areas or "dens" to overwinter (brumate, see hibernation), the snakes benefiting from the combined heat. In cool temperatures and while pregnant, pit vipers also bask on ...