However, like most snakes they will defend themselves if they feel they are unable to escape. Lowland Copperheads overwinter in animal burrows close to water. In late summer and early autumn male Copperheads become sexually active and move about in search of females. While looking for mates male snakes do not eat and are known to fight with one another, which has lead to male Lowland Copperheads growing to a larger size than females. They mate in late summer and sperm is stored in the oviducts over winter.
Ovulation occurs in the following spring and young are born in late summer.
The females breed once they have a head and body length over 620 mm. At birth the baby Copperheads are 180 - 200 mm in total length. On mainland Australia Lowland Copperheads occur in the far south-eastern corner of South Australia and over much of southern Victoria. Appears secure although some populations have crashed severely in recent times. Habitat destruction, including draining swamps and marshes, overgrazing and any activities that impact frog populations could severely threaten local populations of this inoffensive species.