Santos Júnior, Antônio, Walfrido M. Tomas, Iria H. Ishii, Neiva M.R. Guedes, e John D. Hay. 2007. “Occurrence of Hyacinth Macaw Nesting Sites in Sterculia Apetala in the Pantanal Wetland, Brazil”. Gaia Scientia 1 (2). https://periodicos.ufpb.br/ojs/index.php/gaia/article/view/2268.