Rattlesnakes are a type of venomous snakes found in America. They eat birds and small animals. Large predatory birds like eagles in turn eat rattlesnakes.

Rattlesnakes cause most snake bite injuries and deaths in America. They are a threatened species now because people kill so many of them.

Rattlesnakes scare off predators by rattling their tails. The rattling sound is made by special scales at the end of the rattlesnake's tail.