Interesting caterpillars... (BIG TIME BANDWIDTH WARNING!!!)

[Donkey Hotay]

Peter, would you be willing to send a (cropped, slightly reduced in size) photo to What's That Bug ?
You captured detail that the other photo seems to lack.
TC (DH at home) couldn't see the spines very well on the WTB site, but the side stripes were the clincher. Your photo has both stripes and spines.