[Inachis io] hibernate over winter from September/October. On the contrary a badly behaved one was yesterday (1st Now) flying around my flat in the Czech Republic and the temperatures here have already dropped nearly to zero on the outside.

Source: http://lifeonanoxfordlawn.blogspot.com/2007/07/peacock-butterfly-inachis-io.html

In treees and bushes in dark areas and where their food is which is leaves because the eat them to survive!
Caterpillars are the larva stage of butterflies and moths. Each species will lay eggs on specific plants: the Peacock butterfly, Inachis io (Linnaeus, 1758), uses nettles as their host plants. Cabbage White's favour Brassicas: cabbages, etc.