• [Wiki] http://en.wikipedia.org/wiki/Cinnyris_osea.
• [avibase] https://avibase.bsc-eoc.org/species.jsp?lang=EN&avibaseid=783E492C70851B12&sec=lifehistory.
• [GoldYom1988] Goldstein, H. and Yom-Toy, Y. (1988). Breeding biology of the orange-tufted sunbird in Israel. Ardea, 76:169--174.
• [Kooy2010] Kooijman, S. (2010). Dynamic Energy Budget theory for metabolic organisation. Cambridge Univ. Press, Cambridge.
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