Are arboreal snakes venomous

Snakes of the genera Atheris (bush vipers), Bothriechis (palm-pitvipers), and Bothriopsis (forest-pitvipers) are all uniformly arboreal and very venomous. There are also the Mambas of Dendroaspis (literally means "tree snake") and a majority of cobras are semi-arboreal. There are also snakes like Mangrove Snakes and Boomslangs that are technically obscenely venomous but have a poor delivery system as they are rear-fanged.

However, there are as many (if not many more) non-venomous species of snakes. That should not be taken to mean that being bitten by such a snake is not serious, many boas and pythons have very nasty bacteria that can lead to dangerous infections.