Volchya River (Vuoksi tributary)
 The Volchya River (Finnish: Saijanjoki (Saejoki Sadejoki Suenjoki Sudenjoki); Russian: Волчья) is a 52 km long tributary of Vuoksi River situated on Karelian Isthmus (Leningrad Oblast Russia) 0.25-12 km to the west of the Saint Petersburg-Hiitola railroad (along the section between the stations Vaskelovo and Losevo) and flowing northwards from the Lembolovo Heights.