Eastern green mambas are the smallest of the mambas. Green mambas reach an average of length of 1.8 meters, with a maximum length of up to 3.7 meters. The body is slender and bright green, with scales laid like paving stones against darker skin. The dorsal scales are darker than the scales on the belly. These beautiful fast-moving snakes are highly venomous, but less aggressive than black mambas.