Esko Hyvärinen, Aino Juslén, Eija Kemppainen, Annika Uddström & Ulla-Maija Liukko (toim.): Suomen lajien uhanalaisuus - Punainen kirja 2019, s. 565. Helsinki: Ympäristöministeriö - Suomen ympäristökeskus, 2019. ISBN 978-952-11-4973-3Teoksen verkkoversio Viitattu 14.8.2021.
iucnredlist.org
BirdLife International: Aythya ferinaIUCN Red List of Threatened Species. Version 2021-1. 2019. International Union for Conservation of Nature, IUCN, Iucnredlist.org. Viitattu 8.4.2021. (englanniksi)
Common Pochard, Aythya ferinaThe IUCN Red List of Threatened Species. Version 2023-1. International Union for Conservation of Nature and Natural Resources. ”The European breeding population is estimated at 89,700-151,000 pairs (179,000-302,000 mature individuals), and the wintering population is estimated at 560,000-1,020,000 individuals (373,000-679,000 mature individuals). The breeding population in the EU28 is estimated at 28,500-55,000 pairs (57,000-110,000 mature individuals) and the wintering population is estimated at 317,000-446,000 individuals (211,000-298,000 mature individuals).” Viitattu 31.1.2024. (englanniksi)
Common Pochard, Aythya ferinaThe IUCN Red List of Threatened Species. Version 2023-1. 2021. International Union for Conservation of Nature and Natural Resources. ”The global population is estimated to number 760,000-790,000 mature individuals, which equates to 1.14-1.18 million individuals in total (Wetlands International 2021). Three flyways are identified, with the following population estimates: North-East/North-West Europe with 100,000 mature individuals (150,000 total); Central & NE Europe/Black Sea & Mediterranean with 350,000 mature individuals (530,000 total); Western Siberia/South-West Asia with 310,000-330,000 mature individuals (460,000-500,000 total). The European breeding population is estimated at 89,700-151,000 pairs, which equates to 179,000-302,000 mature individuals or c. 270,000-450,000 total individuals” Viitattu 31.1.2024. (englanniksi)
