Fauna
Reptile

Western Brown Snake

Pseudonaja mengdeni

Also known as Mengden's Brown Snake, Gwardar

Western brown snakes are fast, alert elapids native to the arid interior of Australia, capable of thriving in harsh, sunbaked landscapes. They hunt actively by day and into warm evenings, using keen eyesight to track down lizards, small mammals, and ground-nesting birds across spinifex and scrub. When confronted, they quickly rear into a classic S-shaped defensive posture, striking rapidly if pressed before darting into rodent burrows or rock crevices.

VenomousReptileDiurnal
Western Brown Snake reference
Carl-st205 / CC BY-SA 4.0 · cc-by-sa
—observations
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Least ConcernConservation statusIUCN Red List categoriesLCNTVUENCREWEXLeast ConcernRed List categories, explained →
Key facts
Diet & preySmall mammals, Lizards, Frogs
Predators
  • Birds of prey
  • Monitor lizards
  • Feral cats
ThreatsLand clearing, road mortality, and predation by invasive species
HabitatsArid shrublands, open woodlands, desert grasslands, and rocky outcrops
Life span10–15 years
Classification
  1. FamilyElapidae
  2. SpeciesPseudonaja mengdeni
Range & activity
Range data is not available yet.
Safe observation
Interaction riskVery high
  1. Low
  2. Moderate
  3. High
  4. Very high
Why interaction risk is very high
Possesses dangerously potent venom; keep a wide distance and never attempt to handle.
Why it is dangerous
Produces potent procoagulants and neurotoxins that trigger rapid consumption coagulopathy, severe bleeding, and cardiac collapse.
How to recognize a risky encounter
Recognized by a slender build, glossy scales in varied shades of tan, orange, or black banding, and a defensive S-curve display.
What to do
Do not attempt to touch or relocate; step back slowly, keep pets leashed, and contact a licensed snake handler if indoors.
Responsible observation
  • Give Space: Maintain at least five meters of distance to avoid triggering a strike.
  • Wear Sturdy Boots: Use thick leather footwear and gaiters when walking through tall grass or spinifex.
  • Stand Still: Freeze if you startle one close by, allowing it to flee without feeling cornered.
Related species
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