WESTERN BROWN SNAKE or GWARDAR
Pseudonaja nuchalis complex
Highly Venomous - Extremely Dangerous
Pseudonaja aspidorhyncha, from the eastern two-thirds of South Australia; differs from the other species of the nuchalis complex in having a light lining to the mouth. Adults are sometimes banded.
Pseudonaja mengdeni, widespread across the western two-thirds of Australia; has a black lining to the mouth, and from P. nuchalis genetically.
Usually orange with black head or pale headed, with grey nape.
Pseudonaja nuchalis is known only from the tropical Northern Territory and possibly northern Queensland; differs from all Pseudonaja genetically. It has a black lining to the mouth and a rounded snout.

From Southern SA
From Southern SA