• [Wiki] http://en.wikipedia.org/wiki/Merops_pusillus.
• [avibase] https://avibase.bsc-eoc.org/species.jsp?lang=EN&avibaseid=C0A68CA01963299C&sec=lifehistory.
• [McCl2020] PhD thesis.
• [Kooy2010] Kooijman, S. (2010). Dynamic Energy Budget theory for metabolic organisation. Cambridge Univ. Press, Cambridge.