Venom orifice near the tip of the fang of a Gaboon Viper, also known as a Butterfly Adder, Forest Puff Adder, or Swampjack (Bitis gabonica). This is an African viper with he largest fangs of any known venomous snake.
Proximal end of a Gaboon Viper fang, also known as a Butterfly Adder, Forest Puff Adder, or Swampjack (Bitis gabonica). This is the end of the fang that is attached to the snake, and the place the venom enters, from the venom gland. The Gaboon Viper is an African viper with he largest fangs of any known venomous snake.