• [Wiki] http://en.wikipedia.org/wiki/Calendulauda_erythrochlamys.
• [AnAge] http://genomics.senescence.info/species/entry.php?species=Alauda_arvensis.
• [namibian] http://www.namibian.org/travel/birds/dune-lark.html.
• [Boye1988] Boyer, H. J. (1988). Breeding biology of the dune lark. Ostrich, 59:30--37. doi:10.1080/00306525.1988.9633924. doi:10.1111/j.1474-919X.2001.tb04894.x.
• [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.