Cinnabar caterpillars dying from ?parasite

Cinnabar caterpillars dying from ?parasite

Observation - Cinnabar caterpillars dying from ?parasite. Description: My thriving colonies of Cinnabar caterpillars all suddenly died. This is the remains of one with what could be a parasitoid pupa attached. Last year I had huge numbers of Cinnabars which stripped the Ragwort. This year there are now none at all. Anyone

My thriving colonies of Cinnabar caterpillars all suddenly died. This is the remains of one with what could be a parasitoid pupa attached.

Last year I had huge numbers of Cinnabars which stripped the Ragwort. This year there are now none at all. Anyone else notice mass Cinnabar death?