They are highly venomous. It has a highly potent venom, which it delivers through large fangs located in the back of the jaw. The average adult boomslang is 100–160 centimetres (3.3–5.2 ft) in total length. The eyes are exceptionally large, and the head has a characteristic egg-like shape. Males are light green with black or blue scale edges, but adult females may be brown.
By William Warby from London, England - Boomslang SnakeUploaded by berichard, CC BY 2.0, https://commons.wikimedia.org/w/index.php?curid=6492092
Snake Slang
The boomslang is an excellent climber and is highly arboreal, living mainly in forested areas. Its diet includes chameleons and other arboreal lizards, frogs, and occasionally small mammals, birds, and eggs from nesting birds, all of which it swallows whole.
(*) https://en.wikipedia.org/wiki/Boomslang
(*) https://www.africansnakebiteinstitute.com/snake/boomslang/
(*) https://www.sanbi.org/animal-of-the-week/boomslang/
(*) https://capesnakeconservation.com/boomslang/
(*) https://www.krugerpark.co.za/africa_boomslang.html
Because boomslang venom is slow-acting, symptoms may not become apparent until many hours after the bite. Although the absence of symptoms provides sufficient time for procuring antivenom, it can also provide victims with false reassurance, leading to their underestimating the seriousness of the bite.
Sources:(*) https://en.wikipedia.org/wiki/Boomslang
(*) https://www.africansnakebiteinstitute.com/snake/boomslang/
(*) https://www.sanbi.org/animal-of-the-week/boomslang/
(*) https://capesnakeconservation.com/boomslang/
(*) https://www.krugerpark.co.za/africa_boomslang.html