• [Wiki] http://en.wikipedia.org/wiki/Falcipennis_canadensis.
• [avibase] https://avibase.bsc-eoc.org/species.jsp?lang=EN&avibaseid=4BCA4FFF85E6B1E2&sec=lifehistory.
• [AnAge] https://genomics.senescence.info/species/entry.php?species=Falcipennis_canadensis.
• [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.
• [SchrBlom2021] Schroeder, M. A., Blomberg, E. J., Boag, D. A., Pyle, P., and Patten, M. A. (2021). Spruce grouse (Canachites canadensis), version 1.1. in birds of the world (p. g. rodewald, editor). cornell lab of ornithology, ithaca, ny, usa. https://birdsoftheworld.org/bow/species/sprgro/cur/breeding. doi:10.2173/bow.sprgro.01.1.