
Clouded yellow butterfly sighting by Dave Steel
Chat Moss including Little Woolden Moss
Clouded yellow butterfly
Clouded yellows are migrant butterflies which arrive here from May onwards. They appear in small numbers most years, but occasionally turn up en masse, known as 'Clouded yellow years'.
Clouded yellow butterflies cannot survive the winter in the UK, but this one is enjoying a late burst of sunshine at Chat Moss this month. If the winter stays temperate enough, migrants can become residents. Identified by their bright yellowy-orange upperwing surfaces, which are lined with broad, dark edges, and a yellowy-green underside. Dave Steel, regular visitor and birder, photographed this one resting with its wings closed. You can see two silver-white spots on the hindwings in this pose.