GUNTHER, Mrs. Walter. Sugar Water for Hummingbirds at Lanigan, Saskatchewan. Blue Jay, [S. l.], v. 31, n. 2, 1970. DOI: 10.29173/bluejay3916. Disponível em: https://bluejayjournal.ca/index.php/bluejay/article/view/3916. Acesso em: 17 may. 2024.