The didgeridoo would be the answer you're looking for.
indigenous
Gorillas are not native to Australia. They are native to Africa only. A gorilla that lives in Australia is just a gorilla.
Yes; the mallee fowl is native to Australia - hence its name. Mallee is an Australian plant, tough and woody.
Australia's full title is Commonwealth of Australia.
Didgeridoo
lions elephants lorikets tigers monkeys
An arara is a species of cockatoo native to Australia, Latin name Probosciger aterrimus.
The Quenda is another name for the Southern Brown Bandicoot, a marsupial native to Australia.
Maori live in New Zealand. Koalas are native to Australia. There is no native maori word for the koala.
Opossum - this marsupial is not related to the possum which is native to Australia.
In its native Australia, the honey possum is called the "noolbenger".
A cabbage gum is a tree native to Australia, Latin name Eucalyptus amplifolia.