Pebble Prominent (Notodonta ziczac) caterpillar

I went searching for puss moth cats again and failed again, but instead I found three caterpillars that were new to me on sallow. A little research suggests they are pebble prominents, given their binomial by none other than Linnaeus himself, calling them ziczac because of the zig-zag pose typical of the larva of this species of moth.

Done