Printouts Rattlesnakes are poisonous snakes that have a rattle on their tail. In colder areas, this normally solitary snake overwinters in a den with many other rattlesnakes. These snakes are good swimmers.
Rattlers try to avoid humans.
The biggest rattlesnake is the Eastern Diamondback . A hollow rattle on the tail makes a buzzing sound when it moves. They continue to grow all their lives, getting bigger and bigger each year. Their scaly skin glistens but is dry is to the touch. Females give birth to about 10 live young, born without a rattle.