The Green Mamba refers to two highly venomous, arboreal snakes: the Eastern Green Mamba (Dendroaspis angusticeps) and the Western Green Mamba (Dendroaspis viridis), both native to Africa. They are fast, agile, and mostly found in trees, using their bright green colour as camouflage. Their venom is neurotoxic, affecting the nervous system, and can be fatal without treatment.