Primitive snakes. Boa constrictors and anacondas -- Specialized boas -- The pythons -- The acrochordidae -- Colubrids, the "typical snakes". The ratsnakes -- Bullsnakes, pine snakes, and gopher snakes -- The kingsnakes -- Indigo snakes, cribos, whipsnakes, and racers -- Water snakes and their allies -- Other colubrids -- Opisthoglyphous colubrids, the rear-fanged snakes -- Venomous snakes. Venom and antivenom -- Proteroglyphous snakes, the elapids -- The sea snakes, Laticaudinae and hydrophiinae -- Solenoglyphous snakes, the viperids -- Pit vipers, the crotalids -- Asian pit vipers, trimeresurus -- Neo-tropical pit vipers -- Rattlesnakes.
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