Sunday, 20 September 2009

Pied Wagtail Variability

Watching a few Pied Wagtail yarrelli going to roost the other night and I was struck by the variability of the females. I'm hoping one or two of the ringers might comment on whether this is just moult ( I think not) or simply variability in individuals. It seems to be particularly with regard to the amount of black on the forehead and in the ear coverts. I've arranged the images from least black to most, the final image had me checking other races but it is simply a yarrelli with extensive black on the forehead and ear coverts. Image 2 also shows the slight yellowish tinge that sometimes occurs in winter plumage.

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