I found this on wikipedia - apparently they can be very territorial which I never knew, it also mentions about them over wintering, after which they look for a mate ! The poor things must be confused with all thie peculiar weather?
https://en.wikipedia.org/wiki/Aglais_ioI also found some useful info on the UK Butterflies website..
http://www.ukbutterflies.co.uk/species. ... me=PeacockThe Peacock is a familiar sight in gardens across the British Isles and is unmistakable, with quite spectacular eyes on the upperside of the hindwings that give this butterfly its name. These eyes must appear very threatening to predators, such as mice, that confront this butterfly head-on, where the body forming a "beak", as shown in the image below.
The underside is a different matter altogether, being almost black, providing perfect camouflage when the butterfly is at rest on a tree trunk, or when hibernating. In addition to camouflage and large eyes, the butterfly is able to make a hissing sound by rubbing its wings together that is audible to human ears. All in all, this butterfly must appear very threatening to any predator that might come across it. This is a highly mobile butterfly that occurs throughout the British Isles, including Orkney and Shetland, although it is not found in parts of northern Scotland. However, its range does seem to be increasing, with sightings from new areas being recorded every year.
This butterfly can turn up almost anywhere, given its broad distribution. This butterfly is often encountered while hibernating in outbuildings, such as a garage, shed or barn, where they are often in the company of other individuals. Other hibernation sites include hollow trees and wood piles, where their dark undersides provide excellent camouflage.