One of my four captive larvae seems to have shrivelled up and died. This seems to be a familiar problem to those of us who breed iris, occurring in late winter / early spring. But what causes it? Is the bitter east to north-east wind which has plagued us for almost a month responsible?
I need to check the wild larvae again, to see if they're alright, but in three years' recording to date I have only once had a wild larva desiccate.