"Passeriformes" . "Aves" . . "Motacillidae" . . "Plain-backed Pipit" . . . . "Vieillot 1818" . . "Chordata" . "Anthus" . . . . "Animalia" . . "Anthus leucophrys" . "Anthus leucophrys Vieillot 1818" . . . . .