A type of pit viper found in the southeastern United States, the eastern diamondback rattlesnake is the heaviest rattlesnake species worldwide. Not only is the eastern diamondback venomous, but it is believed to be the most venomous snake found in the United States. Scientific Name: Crotalus adamanteus Characteristics: Given the potency of the eastern diamondback’s venom, it’s best you handle this model instead of the real thing! Life-like and scientifically accurate, this figurine will please even the pickiest biologist! Size and Color: Measuring 40 inches long and 1 inch tall, this model is a bit longer than a yardstick and about as tall as a quarter stood upright. As its name implies, the eastern diamondback can be identified by the diamond pattern on its back as well as its brown, white, and tan color.