LEDINGHAM, G.F. Red Crossbills Feeding on Aphids. Blue Jay, [S. l.], v. 17, n. 4, 1959. DOI: 10.29173/bluejay2145. Disponível em: https://bluejayjournal.ca/index.php/bluejay/article/view/2145. Acesso em: 3 jul. 2024.