Cacophis harriettae (White-crowned Snake)

Found in widespread in most habitats including well-vegetated home gardens. Normally encountered active at night, or uncovered by day in compost heaps, rockeries etc.

ALA:- https://bie.ala.org.au/species/https://biodiversity.org.au/afd/taxa/5d3b3850-b59c-4474-a7e0-aa1f40361344