Unknown butterfly and Tussilago farfara

Went for a shooting on the hill nearby for about 2 hours. Haven't been on that hill for about 2 months, yet in the winter at some point I was there every week. Managed to get some pics of those few flower species which already bloom, a ladybird, bumble bees and this butterfly (which I don't recognize) on coltsfoot. The flower's called widow's leaf in Finnish because the leaf and flower don't appear at the same time.

Too bad the extended weekend's almost over.