This extraordinary scrap of life was slowly traversing the path.
It seemed to be a cross between a feather duster and a plastic cat toy: a pulsating gobbit of implausible life. The photo shows the pink tufts and psychedelic green body, but it does not show the strange black winking eye on its back. The eye appeared to open and close as the caterpillar squeezed along and no doubt this was evolved to frighten away a hungry bird. The bright hairs are to make the caterpillar inedible, if the winking eye was not enough to keep it safe through the winter.
Should this fearsome tiny fright makes it to spring time, it will be a pale tussock moth, grey and furry and quite unlike this wonderful punk adolescent caterpillar phase caught indignantly crossing the path this cold afternoon.