• [Wiki] http://en.wikipedia.org/wiki/Himatione_sanguinea.
• [avibase] https://avibase.bsc-eoc.org/species.jsp?lang=EN&avibaseid=374CF44908C9E565&sec=lifehistory.
• [AnAge] http://genomics.senescence.info/species/entry.php?species=Himatione_sanguinea.
• [FancRalp2020] Fancy, S. G. and Ralph, C. J. (2020). Apapane (Himatione sanguinea), version 1.0. in birds of the world (a. f. poole and f. b. gill, editors). cornell lab of ornithology, ithaca, ny, usa. doi:10.2173/bow.layfin.01.
• [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.