Pseudechis australis; Mulga Snake. Found: throughout Australia, except VIC, Tasmania and the most southern parts of WA. The heaviest venomous snake in Australia. Temperament seems to vary: southern are shy whereas northern are more agitated if disturbed. Mulgas bite savagely, even hanging on and chewing as they inject their venom, which destroys blood cells and affects the muscles and nerves. Commonly known as king brown snake though actually a member of the black snake genus.