FAMILY COLUBRIDAE (COLUBRID SNAKES).
Colubrids are found only in tropical parts of Australia and along the east coast. About ten species occur within Australia. Elsewhere in the world, Colubrids are the dominant type of snake. Colubrids are an extremely diverse group of snakes in terms of physical forms, biology,
etc.
Species may be non-venomous or venomous. Venomous species inject their venom by fangs mounted at the rear of their mouth, and no Australian Colubrid is regarded as being dangerous, the bites merely being of nuisance value.
Those species which occur in Australia are usually found elsewhere, and the invasion of this family into Australia occurred in Australia's recent geological history.

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.