Considered by some authors to be a subspecies of Yellow Wagtail (Motacilla flava). References See References. Files: More Information BirdLife International For more information about the British Yellow Wagtail see... BirdLife International Species Factsheet. Articles about the British Yellow Wagtail If you would like to read any articles about the British Yellow Wagtail... Show Articles (0) No Pictures of British Yellow Wagtail If Birdpedia has no pictures of British Yellow Wagtail or you would like to see more, then try the following... From BING (0) No Videos of British Yellow Wagtail If Birdpedia has no videos of British Yellow Wagtail or you would like to see more, then try the following.. From BING (0)