Byrkjedal, Ingvar, Kåre Kyllingstad, Svein Efteland, and Steinar Grøsfjell. “Population Trends of Northern Lapwing, Eurasian Curlew and Eurasian Oystercatcher over 15 Years in a Southwest Norwegian Farmland”. Ornis Norvegica 35 (February 23, 2012): 16–22. Accessed December 25, 2024. https://boap.uib.no/index.php/ornis/article/view/238.