• [Wiki] http://en.wikipedia.org/wiki/Hirundo_atrocaerulea.
• [avibase] https://avibase.bsc-eoc.org/species.jsp?lang=EN&avibaseid=CB7FB32A81D4E09A&sec=lifehistory.
• [Evan2021] Evans, S. W. (2021). The time-activity budgets of breeding blue swallows Hirundo atrocaerulea and the effects of weather on nestling growth. Ostrich, 92(2):113–123. doi:10.2989/00306525.2021.1911005.
• [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.