Parnassius nomion, the Nomion Apollo, is a forest steppe butterfly which is found in the Urals, Altai, south Siberia, Amur and the Ussuri region, Mongolia, China and Korea. It is a member of the snow Apollo genus (Parnassius) of the swallowtail family (Papilionidae). Populations vary throughout its range and there are very many described subspecies. The adult flies from July to mid-August and the larvae feed on Sedum and Orostachys (Crassulaceae).