I think that is what it is. Extraordinary climbers. I find them on the second floor of the house every few months. I see them outside a few times a week. Colouration is highly variable locally. Here they are green and black.
Wikipedia and a few other sources say this
Also, it is reported to take snakes occasionally, and to avoid frogs, though frogs are also reported being eaten.
In Cambodia they always take frogs, and will strike poisonous toads, then spit them out.
This is near Sihanoukville