Large Yellow Underwing - Noctua pronuba
One of the most common visitors to the light trap I have put out in the garden over the past month has been the Large Yellow Under-wing. One morning I counted 25 hiding among the egg boxes, all clinging on determedly, and difficult to displace. According to the UK Butterfly Conservation in the report "The State of Britains Larger Moths 2013" the incidence of N. pronuba has increased by 186% during the period of 1968-2007 (1). The distribution map from the NBN gateway shows how widely distributed it is. This is a fairly large moth with a wing span up to 60mm. At rest it's not the most spectacular of moths, with a base colour of brown, and few distinguishing markings besides the kidney spots on its wings. However when it flies there's a flash of colour as the forewings spread out and expose the bright orange/yellow colours of the rear wings. As soon as it comes to rest the rear wings are folded away and hidden once more. They rest during the day, but will flash their b...