Koskimies, P. and Saurola, P. (1985) “Autumn migration strategies of the Sedge Warbler Acrocephalus schoenobaenus in Finland: a preliminary report”, Ornis Fennica, 62(4), pp. 145–152. Available at: https://ornisfennica.journal.fi/article/view/133190 (Accessed: 26November2024).