CARSON, R. D. A Migratory Congregation of Swainson’s Hawks. Blue Jay, [S. l.], v. 18, n. 4, 1960. DOI: 10.29173/bluejay2182. Disponível em: https://bluejayjournal.ca/index.php/bluejay/article/view/2182. Acesso em: 5 dec. 2025.