FOX, Glen A. Notes on the Western Race of the Pigeon Hawk. Blue Jay, [S. l.], v. 22, n. 4, 1964. DOI: 10.29173/bluejay2600. Disponível em: https://bluejayjournal.ca/index.php/bluejay/article/view/2600. Acesso em: 16 apr. 2025.