de Kloet, RS; de Kloet SR (2005). "The evolution with the spindlin gene in birds: Sequence Investigation of an intron of your spindlin W and Z gene reveals 4 major divisions of the Psittaciformes".
Kea parrots are https://haleemafktf043324.bloggactif.com/31045644/the-definitive-guide-to-african-grey-parots-for-sale