MEISSNER, Włodzimierz; KOZAKIEWICZ, Dorota. Local variation in sex ratios in three species of wintering ducks: the need for large-scale sampling. Ornis Fennica, [S. l.], v. 102, n. 1, p. 28–42, 2025. DOI: 10.51812/of.160744. Disponível em: https://ornisfennica.journal.fi/article/view/160744. Acesso em: 8 dec. 2025.