• [Wiki] http://en.wikipedia.org/wiki/Anthus_spragueii.
• [avibase] https://avibase.bsc-eoc.org/species.jsp?lang=EN&avibaseid=BF380B5D0EB23BB9&sec=lifehistory.
• [Dohm2009] Dohms, K. M. (2009). Sprague's Pipit (Anthus spragueii) nestling provisioning and growth rates in native and planted grasslands. PhD thesis, University of Regina, Regina.
• [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.