YELLOW FACED WHIP SNAKE Demansia psammophis (Schlegel, 1873)
The Yellow Faced Whip snake is found in most parts of mainland
Australia.
Colourwise this snake is one of the most variable in Australia.
Specimens range in colour from greys, greens, and yellows, often with reddish markings running along the back. The scales may or may not form a 'reticulated' pattern. Although the average length is 65 cm, specimens of over a metre are known.
The scalation is smooth with 15 mid body rows, 165-230 ventrals, single anal, and 68-105 paired subcaudals.
The Yellow Faced Whip Snake is found in all types of habitat.
This swift moving diurnal species feeds principally on lizards which it actively chases. When inactive this species hides under ground litter such as rocks, logs, bark, etc. During the colder months adult pairs are commonly found together in a single site, indicating that this is the mating season. Winter aggregations of up to five specimens are commonly found.
Males are usually the larger specimens and male combat in the form of two males twisting around one another and biting each other is known.
Male combat occurs during the mating season, but in this species is not necessarily directly connected with the seduction of a mate.
When caught, this species will not hesitate in biting its' captor, causing painful local swelling.
From 3 to 9 eggs are laid, often communally, in summer by this snake.
The eggs take about 8-9 weeks to hatch and the hatchlings measure 15 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.