Larvae are just beginning to colour up in the wild - one out of 8 seen today had started to change colour, the others were still in Lincoln green. This is slightly behind the norm, but the weather has been mild.
There's a lot of rust, mildew, spots and assorted poxes on tree leaves this autumn, presumably because of the warm, moist summer. On sallows, there's a lot of blackening on leaf tips and edges, which is displacing larvae off their favoured tips.
Here's one of today's larvae -
Seemingly, throughout the Empire many sallows have blackened off badly, shedding leaves prematurely.