• [Wiki] http://en.wikipedia.org/wiki/Spiza_americana.
• [AnAge] https://genomics.senescence.info/species/entry.php?species=Spiza_americana.
• [avibase] https://avibase.bsc-eoc.org/species.jsp?lang=EN&avibaseid=592E58CE67D092DA&sec=lifehistory.
• [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.
• [SousTemp2022] Sousa, B. F., Temple, S. A., and Basili, G. D. (2022). Dickcissel (Spiza americana), version 2.0. in birds of the world (t. s. schulenberg and b. k. keeney, editors). cornell lab of ornithology, ithaca, ny, usa. doi:10.2173/bow.dickci.02.