The green color identifies this Boonslang as a rather large male. The female tends to be brownish. This one is about 8 feet long. It is a tree-dweller, and will lie on a branch of a large bush, waiting for some bird to alight. I have seen it attack bird nests for the eggs. It is very poisonous and, therefore, extremely dangerous, because it hides amongst the folliage from which it can strike without being seen. [Botswana].