SEALY, S. G. Wing-Flapping by Mud Gathering Cliff Swallows: Additional Comments. Blue Jay, [S. l.], v. 74, n. 1, p. 21–21, 2016. DOI: 10.29173/bluejay267. Disponível em: https://bluejayjournal.ca/index.php/bluejay/article/view/267. Acesso em: 6 dec. 2021.