>>168281Black/almost black snake with a white or very light pink mouth means it's a cottonmouth, also known as a water moccasin. They're both venomous and aggressive. They're also quite territorial where other animals are concerned and sometimes live in groups, so you have to be really careful if you see one. The only snakes I've ever had conflict with in the outdoors are water moccasins.
>http://en.wikipedia.org/wiki/Agkistrodon_piscivorus 