title: Hybridization as a result of spatial and reproductive interactions between species within the group of ‘yellow’ wagtails (Aves, Motacillidae) in areas of sympatry
abstract: The area of overlapping ranges, contact and relationships of two closely related species—the western yellow wagtail Motacilla flava Linnaeus, 1758 and the yellow-headed wagtail Motacilla lutea (Gmelin, 1774)—in the Volga region are the subject of the present study. At present, under conditions of wide sympatry, there is spatial and reproductive interaction between these closely related species—the western yellow and yellow-headed wagtails. Crossbreeding of species of ‘yellow’ wagtails gives a li
journal: Geo&Bio