Place: Hyde Park, London
Date: 20 March 2018.
Place: Creswell Crags, Derbyshire
Date: 23 March 2018.
Place: Sir Peter Scott Hide, Llanelli Wetland Centre
Date: 7 October 2018.
Place: Fishlake Meadows Nature Reserve, Romsey
Date: 28 September 2019.
Place: Tor View Hide, Ham Wall, Somerset Levels
Date: 23 February 2020.
Place: Avalon hide, Ham Wall, Somerset Levels
Date: 23 February 2020.
[Mareca strepera, Family Anatidae, Order Anseriformes, Wikipedia Entry: Gadwall]
The sound of the gadwall (borrowed from the Xeno-Canto website, recordist Matthias Feuersenger)
Distribution and sightings of the gadwall across the British Isles (borrowed and modified from the Bird Atlas Mapstore).
Marnix's Bird Gallery 