Posted: 11/01/2015 at 14:36
Spending winter as a caterpillar is a very common method of surviving for many moths and butterflies. They usually hide in the leaf litter or under plants such as foxgloves and verbascums which offer good protection. Examples include: Dingy Skipper, Chequered Skipper, Large Skipper, Small Skipper, Common Blue, Northern Brown Argus, Small Copper, Green Hairstreak, Small Pearl-Bordered Fritillary, Pearl-Bordered Fritillary, Dark Green Fritillary, Marsh Fritillary, Speckled Wood, Wall, Mountain Ringlet, Scotch Argus, Meadow Brown, Ringlet, Small Heath and Large Heath. Those are from the SW Scotland butterfly site:
Species will differ in south Wales which is a lot warmer!