Western Prairie Rattlesnake
This rattlesnake is most widely found in the U.S. The Western rattlesnake is also known as the prairie rattlesnake, particularly in South Dakota, where it is the only venomous snake in the state. It's also found in the western provinces of Canada and southward across the central U.S. to Mexico. It can be light brown to green in color and is yellowish on the underside.
Eastern Diamondback
The Eastern diamondback rattlesnake is the largest of all rattlesnakes and may be up to 8 feet long and weigh 10 lbs. or more. It is found primarily in the Southeast United States from North Carolina to Florida and into Mississippi and Louisiana. Its habitat includes pine forests, swamp forests and other woodland areas. They eat large rodents and birds.
Western Diamondback
The Western diamondback is the second largest rattlesnake and measures 5 feet or longer. It is found in the southwestern U.S. and parts of Mexico. It feeds on small birds and mammals. However, it is the rattlesnake responsible for most serious bites and fatalities. Because it's the most common rattlesnake associated with bites, anti-venom treatments are widely available.
Timber Rattlesnake
Timber rattlesnakes are found primarily up and down the East Coast from Maine to Florida but may be found west of this region as well. They average 3 to 5 feet long but may reach up to 6 feet in length. Timber rattlesnakes live in heavily wooded areas and have a role in American history. The timber rattlesnake is featured on early flags during the American Revolution such as the "Don't Tread on Me" flag of the first Continental Army.