Ottvall, Richard, and Jan Pettersson. “Is There a Viable Population of Corncrakes Crex Crex on Öland, Southeastern Sweden?: Habitat Preference in Relation to Hay-Mowing Activities”. Ornis Svecica 8, no. 4 (October 1, 1998): 157–166. Accessed November 22, 2024. https://journals.lub.lu.se/os/article/view/22940.