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Snake IdentifierAUSTRALIA · FIELD GUIDE
Western Brown Snake (Pseudonaja mengdeni) on gravel.
Photo credit and licence

Lachlan Copeland · CC BY-SA 4.0 · Licence · Source · Resized without cropping; converted to WebP; metadata removed.

Elapidae

Western Brown Snake

Pseudonaja mengdeni

A slender inland brown snake with yellow, orange or brown body forms and variable dark markings.

Venomous

Identification and appearance

Yellow-to-orange and brown forms occur. Dark scale edges can create a net-like effect, and some snakes have broad or faint bands across the body. Head and neck colours vary between forms.

Other names

Mengden's brown snake, Gwardar

Typical length

AROD reports an average length of about 100 cm. No typical adult interval or species-specific maximum is established here.

Body build

slender

Head appearance

Head and neck may be dark or pale, depending on colour form

Key identification features

  • slender body
  • yellow/orange or brownish body forms
  • reticulation or variable bands
  • pale head and grey nape markings can occur

Where it is found

The described range runs from Carnarvon in Western Australia to Mootwingee National Park in western New South Wales. The broader state list also includes Queensland, South Australia and the Northern Territory.

Diet

Small mammals, ground-nesting birds and lizards.

Reproduction

Egg-laying.

Medical significance

The Australian Museum warns that bites from brown snakes are potentially life-threatening. Treat any suspected bite as a life-threatening emergency. Call 000 for an ambulance and do not wait for identification.

What to do if you encounter one

Keep well clear and leave a route towards cover. Do not chase, corner, handle or inspect it. If it is inside a building, keep people and pets away and contact a qualified local snake remover.

Similar-looking snakes

Other brown snakes can look similar; variable banding and head colour do not establish a safe identification.

Taxonomy notes

Older broad use of Pseudonaja nuchalis is not treated as interchangeable with the current species P. mengdeni.

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