GPSed. Moth or Butterfly larva? Length ~20mm. Looks like it was dead, possibly due to a human foot? It was in the grips of a Tasmanian Badge Huntsman spider (sighting 4599089) that was determined to hold onto it.
Thanks. They took a bit of doing as the spider was doing its best to move it and the grass kept getting in the way. A bit judicious photo cropping also helped.