1. Variation in extinction risk among birds: chance or evolutionary predisposition?;Bennett;Proceedings of the Royal Society of London,1997
2. Bianchi, C. A. 1998. Biologia reproductiva da Arara-canindé (Ara ararauna, Psittacidae) no Parque Nacional das Emas, Goiás. M.S. thesis. Departamento de Ecologia, Universidade de Brasília, Brasília, Brazil.
3. Population viability analysis;Boyce;Annual Review of Ecology and Systematics,1992
4. Effects of weather on avian geophagy in Tambopata, Peru;Brightsmith;Wilson Bulletin,2004
5. Parrot nesting in southeastern Peru: seasonal patterns and keystone trees;Brightsmith;Wilson Bulletin,2005