Place: Campismo Campidouro, Medas, west of Porto on Rio Douro
Date: 2 September 2018.
[Motacilla alba, Family Motacillidae, Order Passeriformes, Wikipedia Entry: White wagtail]
The sound of the white wagtail (borrowed from the Xeno-Canto website, recordist Jorge Leitão)
Distribution of the white wagtail across the British Isles (borrowed from the Bird Atlas Mapstore).