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"Motacilla raii, the Yellow Wagtails, are generally black and white, grey and white, grey with a yellow breast (or even head), greenish with yellow lower parts and greyish or black heads, or almost entirely yelowish." A. H. Evans, 1900

Yellow Wagtail

"Motacilla raii, the Yellow Wagtails, are generally black and white, grey and white, grey with a yellow…