ROLSTAD, J.; ROLSTAD, E. Influence of large snow depths on Black Woodpecker Dryocopus martius foraging behaviour. Ornis Fennica, [S. l.], v. 77, n. 2, p. 65–70, 2000. Disponível em: https://ornisfennica.journal.fi/article/view/133527. Acesso em: 22 marras. 2024.