WEBB, S. L. Abnormal eye colour in a Sombre Greenbul Andropadus importunus . Biodiversity Observations, [S. l.], v. 8, p. 22: 1 – 2, 2017. Disponível em: https://journals.uct.ac.za/index.php/BO/article/view/420. Acesso em: 28 may. 2022.