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Rattlesnakes are the leading contributor to snakebite injuries in North America, but rarely bite unless provoked or threatened; if treated promptly, the bites are seldom fatal. The 36 known species of rattlesnakes have between 65 and 70 subspecies, [ 3 ] all native to the Americas , ranging from central Argentina to southern Canada.
In North America, the females of some species store sperm in their oviducts for at least eight months, and the males (all species of which undergo spermatogenesis during the summer) store sperm in the vas deferens for at least a year. Thus, species that store sperm for a shorter duration mate in the spring and store sperm in the vas deferens ...
Colubrid species found in Central America only cause mild to moderate envenomation in healthy adults, and most of these bites have occurred in humans handling the snakes. [53] Panama may have the greatest incidence of snakebites in Latin America, while El Salvador has the lowest (mostly because B. asper is not found in this country). [54]
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.
The timber rattlesnake, (Crotalus horridus), [192] is a species of venomous pit viper endemic to eastern North America. 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.
Of the 6 venomous snake species native to N.C., 3 are rattlesnakes – pigmy, timber & Eastern diamondback. Each one is protected by the North Carolina Endangered Species Act.
Timber rattlesnakes are present in the eastern United States from southern Minnesota and southern New Hampshire, south to East Texas and North Florida. [26] One hundred and fifteen rattlesnakes have been marked within Brown County State Park in Indiana, one of the few places where they can be found in the state. [27]
But there are many other types of snakes in North Carolina, and most are non-venomous. Some of the most common non-venomous snakes in the Triangle are the black rat snake , the black racer snake ...