Lapshin Nikolai V. RussiaPetrozavodskInstitute of Biology of the Karelian Research Centre, Russian Academy of Sciences, 11 Pushkinskaya Str., Petrozavodsk 185910, Russialapshin@krc.karelia.ru Author's articles STOPOVERS OF SWANS (CYGNUS CYGNUS AND C. BEWICKII) (ANATIDAE, AVES) IN THE AGRICULTURAL LANDSCAPE OF SOUTHERN KARELIA DURING THE SPRING MIGRATION