HANSON, D.; JENSEN, R. Cold Ruby-Throated Hummingbirds in Saskatchewan - May 2021. Blue Jay, [S. l.], v. 80, n. 2, p. 5, 2022. Disponível em: https://bluejayjournal.ca/index.php/bluejay/article/view/6344. Acesso em: 9 dec. 2022.