Bit of an outrage that Noisy Friarbirds aren't on the list - guess they aren't native enough given they're also in Papua New Guinea. I love those guys.
Had to vote for the Butcher Bird, Magpie, and the Banjo Frog. We get the banjos around our place and they really do sound like a banjo playing when there's a few of them on the go. Very Deliverance.
Butcher birds are also in Papua. And there is a “butcher bird” that is more Magpie than Butchie in Papua too!

#teamCurlew ;)
Yup. Curlews definitely got my vote!
So did butcherbird and kookaburra. But if I had had to pick just one, definitely #TeamCurlew.
Kookaburra?
Pobblebonk.
But it's so hard to choose. There are too many fantastic sounds.
Top tier opinion
Sulphur Crested Cockatoo for that begging call that sounds identical to a truck reversing alarm.
Curlew!
I was prepared to be annoyed if the Gang Gang wasn't in the list, but luckily the superior rusty gargling noise is in fact present.