BECK, W. Harvey. Association of a Pintail Drake and a Mallard Pair. Blue Jay, [S. l.], v. 23, n. 3, 1965. DOI: 10.29173/bluejay3306. Disponível em: https://bluejayjournal.ca/index.php/bluejay/article/view/3306. Acesso em: 10 apr. 2025.