Habitat
The Eastern Brown Snake inhabits most of Eastern
Australia and parts of Central and Northern Australia.
The eastern brown snake also inhabits parts of New
Guinea as well. However, its most dense population
occurs on the eastern coastal region of Australia. 
The Eastern Brown Snake is a highly adaptable
organism and as long as there are field mice or other
rodents around you can expect to find it. The habitat
that the snake seems to thrive most in is open woodlands
filled with
eucalypts which the
koala eats, or in scrublands and open grasslands. This snake is,
however, able to live very well in agricultural areas
because of the abundant source of rats and mice that
live in the agricultural fields.
The snake is one of the top predators of most of
Australia’s rodents and small lizards. It has few
predators to worry about in nature, but do include
birds of prey and feral
cats. The snake is generally a
secondary consumer with the mice and rats being the
primary consumer of seeds and grasses. The snake can
also be a tertiary consumer with the small
lizards being
secondary consumers of insects and other small organisms
which, in turn, are the primary consumers of leaves and
grasses.