The saltern form of Orthosia opima (Northern Drab) is now flying on the coast. I had my first of the season at Bawdsey Hall last night (18 April). This is one of my favourite spring moths at Bawdsey. The moth continues to fly well into the middle of May.
Of interest, a wanderer of this species was caught in a light trap the previous night, well inland at Stowupland by Ben Moyes.