It gets its name from the greenish to blackish coloration of its head. Neonates and juveniles do not exhibit this dark color on the head until adulthood. The body color ranges greatly from brown, orange, red, and even black. The ventral region of the snake is yellowish below the neck and white for the rest.{{citation needed|date=April 2016}}
Habitat
The black-headed cat snake is arboreal,[1] but frequently comes down to the ground in search of prey. They occupy lowland and mid-elevation tropical rainforests of Southeast Asia.
Venom
Little is known about the black-headed cat snake's venom toxicity on humans, but it is thought to be comparable to the severity of a copperhead. This rear fanged colubrid's bite rarely results in adverse effects due to its poor venom delivery system. Luckily their fangs' positioning doesn't result in any significant envenomation.
Symptoms tend to stay localized to the envenomation site, limiting the victim to minor pain.
Diet
The black-headed cat snake feeds on lizards, frogs, birds, small mammals[4] and other snakes in the wild.
References
1. ^1 2 3 {{cite journal | author = Grismer, L. | author2 = Chan-Ard, T. | last-author-amp = yes | title = Boiga nigriceps | journal = IUCN Red List of Threatened Species | volume= 2012 | page = e.T192237A2059586 | year = 2012 | doi = 10.2305/IUCN.UK.2012-1.RLTS.T192237A2059586.en }}
2. ^{{Cite web|url = http://www.gernot-vogel.de/index.php?target=checklist|title = Checklist of the Genus Boiga (Serpentes: Colubridae) |last = Vogel |first = Gernot |author2=Janis Kruse |year = 2004 }}
3. ^{{cite web |url=http://www.siam-info.com/english/snakes_boiga.html |title=Genus: Boiga (Cat Snakes) |author=Heinz Klaus Thiesen |year= |work=Siam Info |publisher= |accessdate=23 April 2016}}
4. ^{{Cite web|title = Black Headed Catsnake, Boiga nigriceps | work=REPTAQUATICS.com |url = http://www.reptaquatics.com/node/366|access-date = 2016-01-13 }}