• [Wiki] http://en.wikipedia.org/wiki/Cyanopsitta_spixii.
• [AnAge] http://genomics.senescence.info/species/entry.php?species=Cyanopsitta_spixii.
• [ADW] https://animaldiversity.org/accounts/Cyanopsitta_spixii/.
• [Kooy2010] Kooijman, S. (2010). Dynamic Energy Budget theory for metabolic organisation. Cambridge Univ. Press, Cambridge.
• [PrinPres1991] Prinzinger, R., A.Preßmar, and Schleucher, E. (1991). Body temperature in birds. Comp. Biochem. Physiol., 99A(4):499--506. doi:10.1016/0300-9629(91)90122-S.
• [TschRett2010] Tschudin, A., Rettmer, H., Watson, R., and Hammer, S. (2010). Evaluation of hand-rearing records for Spix's macaw Cyanopsitta spixii at the {Al Wabra Wildlife Preservation} from 2005 to 2007. Int. Zoo Yb, 44:201--211.