.   ^ Snyder, N; McGowan, P; Gilardi, J; & A Grajal (2000), Parrots: Status Survey and Conservation Action Plan, 2000-2004 . Chapter 1. vii. IUCN ISBN 2-8317-0504-5 . Chapter 1. vii. ^ a b Snyder, N; McGowan, P; Gilardi, J; & A Grajal (2000), Parrots: Status Survey and Conservation Action