For citations:

Belyachenko A.V., Piskunov V.V., Belyachenko A.A. CALANDRA LARK (MELANOCORYPHA CALANDRA) AND CORN BUNTING (MILIARIA CALANDRA) (PASSERIFORMES, AVES) CURRENT DISTRIBUTION AND ABUNDANCE ASSESSMENT IN THE NORTHERN LOWER-VOLGA REGION AND ADJACENT TERRITORIES. Povolzhskiy Journal of Ecology. 2016;(1):3-16. (In Russ.) https://doi.org/10.18500/1684-7318-2016-1-3-16