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Dupak, V. and Popelnyukh, V. 1. Aspects of winter communal roosts of Corvus species in Poltava city. The Journal of V.N.Karazin Kharkiv National University. Series «Biology». 29, 2 (1), 151-158. DOI:https://doi.org/10.26565/2075-5457-2017-29-19.