Mitchell, Carl, Kendrew Colhoun, Anthony D Fox, Larry Griffin, Colette Hall, Richard Hearn, Chas Holt, and Alyn Walsh. 2010. “Trends in Goose Numbers Wintering in Britain & Ireland, 1995 to 2008”. Ornis Svecica 20 (3–4). Lund, Sweden:128–143. https://doi.org/10.34080/os.v20.22619.