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Olson, S. L.; Máiz López, E. J. (2008). "New evidence of Ara autochthones from an archeological site in Puerto Rico: a valid species of West Indian macaw of unknown geographical origin (Aves: Psittacidae)". Caribbean Journal of Science. 44 (2): 215–222. doi:10.18475/cjos.v44i2.a9. S2CID54593515.
Olson, S. L.; Máiz López, E. J. (2008). "New evidence of Ara autochthones from an archeological site in Puerto Rico: a valid species of West Indian macaw of unknown geographical origin (Aves: Psittacidae)". Caribbean Journal of Science. 44 (2): 215–222. doi:10.18475/cjos.v44i2.a9. S2CID54593515.