Patio Life: Garden Tiger Parasitized

About a month before this we found this lovely Garden Tiger caterpillar on umbifers, in a footpath where it is likely the council in their wisdom will come along and weed wack.

So we brought it home as this species is one in serious decline for me to rear. He did really well for nearly a month, and finally right on time decided to pupate.
I left him to it for the first 48 hours when it should be safe to check it and move it if needed and it still was in caterpillar. I was gutted wondering what I might have been able to do different to make sure it was ok. A day or so later (just in case) I had a check again and found 8 or 9 of these pupa in near it, now there is no possible way this happened after we brought it home, so out of curiousity I waited until some of them emerged expecting some parasitic wasp or something, and no it was Flesh Flies. I had no idea that flies would paratise a living caterpillar. Sad as it is, its nature and was interesting to see the results.