Tiger snake

"Not to be confused with the tiger keelback snake"
The tiger snake ("Notechis scutatus") is a venomous species of snake inhabiting Australia and its coastal islands, Tasmania included. 
Habitat.
Tiger snakes generally situate themselves near a source of water, such as a creek or wetland. They live from Western Australia to South Australia, and also in its coastal islands, such as Tasmania.
Diet.
It eats mainly frogs and tadpoles, but also small rodents, bats, insects, lizards, fish, birds, and they might also eat each other. 
Venom and danger levels.
Tiger snake venom has myotixons, coagulants, haemolysins, and neurotoxins, all of which are dangerous to people.