Western green mamba (Dendroaspis viridis). West Africa.
Closely related to the Eastern green mamba and the Black mamba. Although it has a similar, dangerously neurotoxic venom as the black mamba, it is not as potent and injects smaller quantities. It is also not as nervous as its cousin. Found mainly in trees but does sometimes venture to the ground to bask or chase its prey.
The body and tail has more yellow colouring than the head.