Keeping out moths at night was a nightmare when the weather was better and the doors and windows were open, but now only a few manage to slip around my defences.  However, some moths still remain on my windows outside early in the morning, one of which was this brimstone moth, Opisthograptis luteolata, which is a beauty.  On a recent flying visit to the visitor centre at the Ynyslas Nature Reserve  book, I flipped through the Collins Complete Guide to British Insects, and the book more or less fell open at the page showing this visitor from last week.  Apparently it is common in Britain and is found in all sorts of environments, but particularly in hedgerows and rosaceous trees and shrubs.