Karlsson, Lennart, Sophie Ehnbom, Karin Persson, and Göran Walinder. 2002. “Changes in Numbers of Migrating Birds at Falsterbo, South Sweden, During 1980—1999, As Reflected by Ringing Totals”. Ornis Svecica 12 (3). Lund, Sweden:113-37. https://doi.org/10.34080/os.v12.22825.