THE BLUE-HEADED WAGTAIL. 67 



found in Holland. It also nests in South-western 

 Norway, but. it is a species quite peculiar to 

 Western Europe, and even in its migrations it 

 still adheres to this distribution, going in winter 

 to Southern France, and, in fewer numbers, to 

 Spain and Morocco, in company with its con- 

 gener, the White Wagtail {Motacilla alba). With 

 this species it returns in spring; but the latter 

 bird takes the place of the Pied Wagtail through- 

 out the greater part of Europe, and visits England 

 more rarely. Sometimes a partnership takes 

 place between the two species, as was proved a 

 few years ago by Lord Walsingham, who in- 

 structed his keepers to procure a pair of Pied 

 Wagtails for the series of groups of British Birds 

 in the British Museum. The nest and young 

 birds were duly obtained with the parent birds, 

 when the male proved to be a White Wagtail 

 {Motacilla alba), and the female a Pied Wagtail 

 (M. lugubris). This curious western distribution 

 is observed in another species of Wagtail, be- 

 longing to the yellow section of the genus, or 

 " Field " Wagtails, as they are usually termed. 

 This is the Yellow Wagtail or Ray's Wagtail, 

 Motacilla campestris, which nests plentifully in the 



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