The Life of a Rattlesnake Definitely not for the squeamish, if you get a bit spooked at the sight of a rattlesnake close-up, you might want to watch with a friend. The program takes a look at the natural history of rattlesnakes in the United States, from the Mexican border all the way North to Canada. This episode focuses on basic anatomy, feeding, denning, life history, social structure, interaction with other of its species and the rattler's role as both predator and prey rattlesnakes are not as invincible as you might think!