GREEN TREE SNAKE Dendrelaphis punctulatus (Gray, 1827)
Found along the coasts and nearby areas of north and east Australia, the
Green Tree Snake may attain up to 2 metres in length.
The colour varies geographically from, greys, to greens, blues, browns, black or yellows. Usually the skin between the scales is green.
The scalation is smooth with 13-15 mid body rows, 180-230 ventrals, divided anal, 100-150 divided subcaudals.
The harmless Green Tree Snake will inflate the forepart of the body and hiss when threatened, revealing the blue skin between the scales. It will also sometimes release a strong smelling odor from anal glands. It is strictly diurnal and forages on the ground and in vegetation, feeding on small vertebrates, particularly frogs. It is a very fast moving species of snake.
When inactive the Green Tree Snake is usually found under ground cover, in tree hollows or rock crevices. Winter aggregations of up to 6 individuals are quite common, and this species will aggregate with other snake species.
About 8 eggs are laid in mid summer, which hatch some 60-80 days later. Hatchlings measure 30 cm.

The above was from the book Australian Reptiles and Frogs by Raymond Hoser and now available on a fantastic CD-Rom along with a vast amount of other information, papers and the like on reptiles, frogs and other wildlife.