DICKSON, Ross D. Northern Mockingbird and Swamp Sparrow Overwinter in Calgary. Blue Jay, [S. l.], v. 49, n. 2, 1991. DOI: 10.29173/bluejay5181. Disponível em: https://bluejayjournal.ca/index.php/bluejay/article/view/5181. Acesso em: 1 may. 2024.