Last Sunday all the wild iris larvae I checked were still in full Lincoln green. Normally, a fair few have started to colour up by then (Oct 20th) and the odd one may even be in hibernation.
They've been colouring up fast this week, both in captivity and in the wild, so that today in the wild only 3 out of 28 seen were still in full Lincoln. Most were about 20-50% coloured up, and the first hibernating larvae was found. Here he is, in a fork of 1cm diameter twigs.
Interestingly, several were seen adding silk to their seat leaf stalk, to strengthen it to cope with the developing wind. Unfortunately it was too windy to photograph that!