Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online. Lasionycta coracina is a moth of the Noctuidae family. It is found in the Richardson and British Mountains in northern Yukon, adjacent Northwest Territories, and Cape Thompson in north-western Alaska.The habitat in the Richardson Mountains is sparsely vegetated gravel tundra slopes with Dryas stripes. The moths are diurnal, most active in the late afternoon and when cloudy.The wingspan is 23 30 mm for males and 24 31 mm for females. Adults are on wing from late June to early August. The adults feed on Saxifraga species.