Shout out to the most deadly serpent in the US: the rattlesnake. Almost all 27 species of this slithering sucker reside in the Lower 48 (except in Maine and Delaware) and the Eastern Diamondback -- which can reach seven-feet in length -- is considered the most venomous species in North America. And while rattlers may only rack up five kills per year, there are anywhere from 4,000-7,000 reported bites, annually. Honorable mention, by the way, goes to the Copperhead and Coral Snake; although are less likely to bite, they are reported to have some of the deadliest venom in the game. Plus, in the case of the Coral snake, since their coloring is so similar to a non-poisonous King Snake, they get their own terrifying rhyme: “Red and Black, Venom Lack. Red and Yellow, Kill A Fellow."