KJELLÉN, Nils. Different migration strategies among Swedish Common Buzzards Buteo buteo revealed by the proportion of white birds. Ornis Svecica, Lund, Sweden, v. 9, n. 1–2, p. 11–18, 1999. DOI: 10.34080/os.v9.22911. Disponível em: https://journals.lub.lu.se/os/article/view/22911. Acesso em: 18 jul. 2024.