ROY, F. Mallard Nests in Abandoned Crow’s Nest in Aspen Tree. Blue Jay, [S. l.], v. 16, n. 3, 1958. DOI: 10.29173/bluejay2820. Disponível em: https://bluejayjournal.ca/index.php/bluejay/article/view/2820. Acesso em: 15 aug. 2022.