Fangs of green mamba (Dendroaspis jamesoni). The fangs of the mambas and cobras are fixed (immovable), unlike those of the vipers which are hinged (see a viper’s fangs on page 6 of this section). The fangs are hollow and deliver a neurotoxic venom. The speed of the mamba and the toxicity of its venom make it a very dangerous snake, including to humans. Ibadan, 1968.