I was quite surprised to find an adult, only 2-3 weeks back, on a green seed pod of a late flowering aconitum. It was amongst a few now brown stemmed lilies so that was probably all that was left for it to try and get a feed. I was still finding some on Cardiocrinum until those leaves succumbed to winter, just a few weeks before. Hopefully this cold wet start to winter will kill off some of those I missed this year; the worst I can remember for this pest. It seemed I was squashing the eggs on the underside of the Cardiocrinum leaves this summer every few days, and had almost a whole green seed pod of one fritillary eaten away, large green/white seed and all, although some lilies were more or less untouched. E.g. Lilium canadense. Brian Whyer, Buckinghamshire, England, zone ~8