This guy is an emperor gum moth caterpillar. 9cm long and weighs a tonne. What a colossus!
Apparently this is how they look just before they go into their cocoon, which they can stay in for a couple of years. And doing a bit of research we discovered that an interesting picture we’d taken just 5 days earlier was a juvenile version of this guy.
Here’s how he’ll look once he emerges from his transformation.