• [Wiki] http://en.wikipedia.org/wiki/Bonasa_umbellus.
• [avibase] https://avibase.bsc-eoc.org/species.jsp?lang=EN&avibaseid=6D2B5CDA60316986&sec=lifehistory.
• [AnAge] https://genomics.senescence.info/species/entry.php?species=Bonasa_umbellus.
• [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.
• [RushDest2020] Rusch, D. H., Destefano, S., Reynolds, M. C., and Lauten, D. (2020). Ruffed grouse (Bonasa umbellus), version 1.0. in birds of the world (a. f. poole and f. b. gill, editors). cornell lab of ornithology, ithaca, ny, usa. https://birdsoftheworld.org/bow/species/rufgro/cur/breeding. doi:10.2173/bow.rufgro.01.