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The Eastern Green Mamba (Dendroaspis angusticeps) is a venomous snake related to the highly dangerous Black Mamba. The Green Mamba is less aggressive and smaller than the Black Mamba, they average around 6 feet. The Green Mamba's venom is also significantly less toxic, however a single bite could certainly be fatal to a human. Green mambas are highly arboreal and almost never touch the ground. They are generally found in south-eastern Africa. Like their name, Green Mambas are a lovely grass green color, but yellow when born.