Bonadie, Wayne A.; Peter R. Bacon «Year-round utilisation of fragmented palm swamp forest by Red-bellied macaws (Ara manilata) and Orange-winged parrots (Amazona amazonica) in the Nariva Swamp (Trinidad)». Biological Conservation, 95, 1, 2000, pàg. 1–5. DOI: 10.1016/S0006-3207(00)00018-5.