Fact About Rattlesnake and Their Babies – Two North American rattlesnake species are commonly called diamondbacks: the eastern diamondback (Crotalus adamenteus) as well as the western diamondback (Crotalus atrox). Both are large species – the eastern is the biggest rattlesnake worldwide – and both have poisonous attacks. Grown-up diamondbacks have basically no all-natural predators. Neonate rattlesnakes are