
Elapidae
Peninsula Brown Snake
Pseudonaja inframacula
A dangerously venomous snake recorded from South Australia’s Eyre and Yorke peninsulas, nearby islands and the Nullarbor coast.
Dangerously venomous
Identification and appearance
Upperparts range from black to brown or yellow-brown. Dark scale edges can create a net-like pattern, with additional fine speckling.
Typical length
The Australian Venom Research Unit lists a length of 1.2–1.6 m without defining a typical adult interval or maximum; numeric matching bounds remain unset.
Key identification features
- Brown, black or yellow-brown upperparts
- Dark edging or speckling
- Dangerously venomous
Where it is found
Eyre and Yorke Peninsulas, South Australian islands and an isolated Nullarbor-coast population. AROD lists SA and WA, while the named localities in the Reptile Database and AVRU account do not resolve the isolated record to a modern WA locality; the WA assignment is therefore retained as qualified.
Diet
A study of museum specimens found few mammals among its prey.
Reproduction
Egg-laying.
Medical significance
For any suspected snakebite, call 000 and follow snakebite first aid. Do not wait for identification.
What to do if you encounter one
Keep clear and do not handle it. Use a qualified snake catcher or local wildlife authority if it is trapped near people.
Similar-looking snakes
Dugites and Eastern Brown Snakes can look similar. Brown or dark colouring alone does not separate them from a Peninsula Brown Snake.
Taxonomy notes
AROD lists SA and WA. The Reptile Database and AVRU describe the peninsulas, South Australian islands and an isolated Nullarbor-coast population; the isolated WA assignment remains qualified pending a modern exact locality.
Sources checked
- Australian Reptile Online Database — Peninsula Brown Snake (2026-09-25)
- The Reptile Database — Pseudonaja inframacula (2026-09-25)
- Australian Venom Research Unit — Common brown snake account (2026-09-26)
- Australian Museum — species comparison (2026-09-26)
- Australian Museum — species comparison (2026-09-26)
- Shine 1989, Constraints, allometry, and adaptation: food habits and reproductive biology of Australian brownsnakes (2026-09-26)
Still not sure?
Compare this snake with more clues.
A profile is a guide, not a reason to approach or handle a snake.

