There are over 10,000 species that have a caterpillar stage in Australia, so identification is likely to be tricky. Indeed, one may have to wait until the adult stage for more precise classification. I was poisoning glycine (Neonotonia wightii) on the eastern bank just upstream the D’Arcy Road steps over the creek, when I came across this specimen. I think it is related to the caterpillar of the Batwing or White Stemmed Gum Moth (Chelepteryx collesi). I’m glad I didn’t brush any of the toxic hairs on its back. I’m not sure what those four prominent white tufts are — perhaps more danger signalling to potential predators?