Common in fens, woodland, heaths, moorland and hedgerows throughout much of the British Isles, with most records in central and southern England. In Hampshire fairly well distributed, but apparently rare in the central half of northern Hampshire and the eastern quarter of southern Hampshire; also sparsely distributed on the Isle of Wight. Wingspan 32-42 mm. Day-flying. Mainly recorded in the larval form, but the early stages are not easy to find during the winter months; attempts to synthesise an artificial pheromone have so far proved only partially successful. Larva feeds within wood of Sallow, Poplar and Willow, over-wintering twice.