The following bibliography has been generated by bringing together all references provided by our content partners. There may be duplication.


  • Joseph, L. 2000. Beginning an end to 63 years of uncertainty: the Neotropical parakeets Pyrrhura picta and P. leucotis comprise more than two species. Proc. Acad. Nat. Sci. Phil. 150:279–292.
  • Joseph, L. 2002. Geographical variation, taxonomy and distribution of some Amazonian Pyrrhura parakeets. Ornitologia Neotropical 13:337-363.
  • Joseph, L. and D. Stockwell. 2002. Climatic modeling of the distribution of some Pyrrhura parakeets of Northwestern South America with notes on their systematics and special reference to Pyrrhura caeruleiceps Todd, 1947. Ornitologia Neotropical 13:1–8.
  • Ribas, C. C., L. Joseph, and C. Y. Miyaki. 2006. Molecular systematics and patterns of diversification in Pyrrhura (Psittacidae), with special reference to the Picta-Leucotis complex. Auk 123:660-680.


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