Hario, M. and Hollmèn, T. E. (2004) “The role of male mate-guarding in pre-laying Common Eiders Somateria m. mollissima in the northern Baltic sea”, Ornis Fennica, 81(3), pp. 119–127. Available at: https://ornisfennica.journal.fi/article/view/133619 (Accessed: 19May2024).