For citations:

Kondrakova K.D. Comparative analysis of the behavior of the Common crane (Grus grus) and Demoiselle crane (Anthropoides virgo) (Gruidae, Aves) during their pre-migration period. Povolzhskiy Journal of Ecology. 2023;(3):290-300. (In Russ.) https://doi.org/10.35885/1684-7318-2023-3-290-300