Media type: E-Article Title: Causes of Variation in the Frequency of Polygyny in the European Pied Flycatcher Ficedula hypoleuca Population of Karelia Contributor: Artemyev, A. V. Published: Pleiades Publishing Ltd, 2018 Published in: Russian Journal of Ecology, 49 (2018) 6, Seite 554-562 Language: English DOI: 10.1134/s1067413618060036 ISSN: 1067-4136; 1608-3334 Keywords: Ecology, Evolution, Behavior and Systematics Origination: Footnote: