• [Wiki] http://en.wikipedia.org/wiki/Pheucticus_melanocephalus.
• [AnAge] https://genomics.senescence.info/species/entry.php?species=Pheucticus_melanocephalus.
• [avibase] https://avibase.bsc-eoc.org/species.jsp?lang=EN&avibaseid=824361E5ACCA64DB&sec=lifehistory.
• [WyatFran2020] Hill, G. E. (2022). Black-headed grosbeak (Pheucticus melanocephalus), version 2.0. in birds of the world (s. m. billerman and b. k. keeney, editors). cornell lab of ornithology, ithaca, ny, usa. doi:10.2173/bow.bkhgro.02.
• [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.
• [West1955] Weston, H. G. (1955). Notes on the development of immature black-headed grosbeaks. Proceedings of the Iowa Academy of Science, 61:636–646.