Lepidopterans of the Lower Amur Region: Barriers of fauna change

Changes in Lepidoptera fauna (without moths) from Southern Primorye to the Amur River mouth have been analyzed. The most significant change in the south-to-north direction has been registered on the border of rich broad-leaved forests. It has been suggested to consider this area the northeastern border of the Amur-Manchurian (Stenopean or Palaearchaearctic) zoogeographic choron. The territory to the north of this border, in the nearby of the Amur River mouth, is inhabited by transitional fauna. The main faunistic barriers of different phenological complexes (spring, summer, and autumn) are different in their location.