NYHOLM, E. S. Notes on the roosting behaviour of the Great spotted woodpecker (Dendrocopos major) and the Three-toed woodpecker (Picoides Tridactylus). Ornis Fennica, [S. l.], v. 45, n. 1, p. 7–9, 1968. Disponível em: https://ornisfennica.journal.fi/article/view/132737. Acesso em: 18 touko. 2024.