1. Cryptonyx ferruginoso, Cryptonyx ferrugineus; 2. Francolim-de-bico-longo, Francolinus longinostris
1830-1834
1. Cryptonyx ferruginoso, Cryptonyx ferrugineus; 2. Francolim-de-bico-longo, Francolinus longinostris by John Edward Gray, 1830-1834, Nature