7. Black moccasin, cottonmouth, water moccasin, swamp moccasin (Agkistrodon piscivorus)
Cottonmouth is indigenous species to the southeastern part of the US, mainly Florida. It inhabits areas around swamps, creeks, shallow lakes and it is considered to be the only venomous water snake of North America, though it is semi-aquatic. It is a thick-bodied species, with a distinctive head and the average length of around 90 centimeters, females being smaller than males. Most of the specimens are evenly darkly colored, but some might appear to have several cross bands on the dorsal (back) side.
