Good questions and suggestions, Jack. I haven't got any empirical data to offer on most of them, so won't venture a guess; but on the question of their patterns of emergence in Switzerland I can say that in my experience they are exclusively well-behaved as a single-brooded species. I've seen all sorts of strange autumn phenomena, from mountain fritillaries in September, through green hairstreaks in October and graylings in November to walls in December (2006), but never a meadow brown out of season. This year we had third broods of northern brown argus, rosy grizzled skipper, many whites, common blues &c. but no meadow browns (or ringlets, for that matter). I've been very interested in these late British sightings of meadow brown and ringlet.Jack Harrison wrote:John W saw:The life cycle of the MB could certainly benefit from study. It is not reliably know to be double brooded (Guy: Is it always single in Switzerland or is the situation just as confusing there?) I offer the suggestion that the larvae hibernate whenever the weather becomes too cold regardless of the state of development of the larvae. So some might hibernate when tiny, others when quite big. It is of course possible that (like some other browns) that a few individuals might spend two winters in hibernation.remarkably fresh looking female Meadow Brown.
Just my ideas of course but there perhaps could be some debate.
Jack
Guy