Tornberg, Risto, and Seppo Haapala. “The Diet of the Marsh Harrier Circus Aeruginosus Breeding on the Isle of Hailuoto Compared to Other Raptors in Northern Finland”. Ornis Fennica 90, no. 2 (July 1, 2013): 103–116. Accessed November 24, 2024. https://ornisfennica.journal.fi/article/view/133827.