FRANKE-BRYSON, U. Swifter than swifts: second Eurasian Hobby ringed in Namibia. Biodiversity Observations, [S. l.], v. 7, p. 1–14, 2016. Disponível em: https://journals.uct.ac.za/index.php/BO/article/view/379. Acesso em: 29 may. 2022.