• [Wiki] http://en.wikipedia.org/wiki/Aegolius_acadicus.
• [ADW] https://animaldiversity.org/accounts/Aegolius_acadicus/.
• [avibase] https://avibase.bsc-eoc.org/species.jsp?lang=EN&avibaseid=26BA25EFD0F06DF7.
• [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.
• [RasmSeal2020] Rasmussen, J. L., Sealy, S. G., and Cannings, R. J. (2020). Northern saw-whet owl (Aegolius acadicus), version 1.0. in birds of the world (a. f. poole, editor). cornell lab of ornithology, ithaca, ny, usa. doi:10.2173/bow.nswowl.01.