The Red-tailed Rat Snake, also called the Red-tailed Green Rat Snake and the Red-tailed Racer, is native to Southeast Asia.
The tail of the otherwise green snake is sometimes brown, even a reddish brown, but often mauvish/blue grey. Its tongue
has bright blue edges.
A non-venomous colubrid, it is arboreal and preys mainly on birds, eggs and bats. It is one of two snakes that
can make a growling sound.
They can grow to some 2.4 metres (8 feet). Their existence in the wild is threatened by over-collection for the pet trade, Chinese
medicine and even food.