Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online. Euclidia triquetra is a moth of the Noctuidae family. It is found in south-eastern Europe, as well as Kazakhstan, Anatolia eastern Sibiria up to the Pacific Ocean. It s habitat consists of warm, dry areas. The wingspan is 24-30 mm. Adults are on wing from mid April to June and from the end of July to August. There are two generations per year. They are active during the day. The larvae feed on various Fabaceae species, including Astragalus and Onobrychis species.