Place: Bird Observatory, Bardsey Island, Gwynedd
Date: 18 May 2019.
Place: Bird Observatory, Bardsey Island, Gwynedd
Date: 20 May 2019.
Place: Bird Observatory, Bardsey Island, Gwynedd
Date: 21 May 2019.
Place: Mist Nets near Bird Observatory, Bardsey Island, Gwynedd
Date: 22 May 2019.
Place: Capel Withy, Bardsey Island, Gwynedd
Date: 23 May 2019.
[Phylloscopus trochilus, Family Phylloscopidae, Order Passeriformes, Wikipedia Entry: Willow warbler]
The sound of the willow warbler (borrowed from the Xeno-Canto website, recordist Patrik Åberg)
Distribution and sightings of the willow warbler across the British Isles (borrowed and modified from the Bird Atlas Mapstore).
Marnix's Bird Gallery 