The Citrine Wagtail or Yellow-headed Wagtail is a small songbird in the family Motacillidae. The term citrine refers to its yellowish colouration. Its systematics, phylogeny and taxonomy are subject of considerable debate in the early 21st century. This is because this bird forms a cryptic species complex with the Yellow Wagtail. Which of the many taxa in this group should properly refer to which population is unlikely to be resolved in the immediate future. It is a slender, 15.5–17 cm long bird, with the long, constantly wagging tail characteristic of the genus Motacilla.

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