A very hungry caterpillar eating away at a blue alkanet. This individual will have hatched some time last summer from one of the eggs laid by a scarlet tiger moth, a brightly coloured day-flying moth.
The caterpillar survived the winter in some safe and snug niche. It re-emerged in April for a final feeding up. It’s now disappeared again to metamorphose, shortly to reappear as one of this year’s adult moths.