Kamchatka wagtail Motacilla (alba) lugens (Gloger, 1829): variability, relationships with the Spectacled white wagtail Motacilla alba ocularis (Swinhoe, 1860), and the taxonomic status
Summary Based on examinations of museum specimens (n = 320) and field descriptions of birds in nature (n = 487), the variability between Kamchatka Motacilla (alba) lugens and Spectacled M. alba ocularis white wagtail plumages were examined. Their populations are phenotypically variable, but [...]