อ้างอิง ของ ห่านแคนาดา

  1. ↑ BirdLife International (2012). "Branta canadensis". IUCN Red List of Threatened Species. Version 2012.1. International Union for Conservation of Nature. สืบค้นเมื่อ 16 July 2012.CS1 maint: ref=harv (link)
  2. ↑ Ogilvie, Malcolm; Young, Steve (2004). Wildfowl of the World. New Holland Publishers. ISBN 978-1-84330-328-2.
  3. ↑ Madge, Steve; Burn, Hilary (1988). Waterfowl: An Identification Guide to the Ducks, Geese, and Swans of the World. Boston: Houghton Mifflin. ISBN 0-395-46727-6.
  4. ↑ Dewey, T.; Lutz, H. (2002). "Branta canadensis". Animal Diversity Web. สืบค้นเมื่อ 2007-11-18.
  5. ↑ Krauss, David A.; Salame, Issa (2012). "Interspecific Killing of a Branta bernicla (Brant) by a Male Branta canadensis (Canada Goose)". Northeastern Naturalist. Northeastern Naturalist Humboldt Field Research Institute. 19 (4): 701. doi:10.1656/045.019.0415. สืบค้นเมื่อ August 2, 2013.

แหล่งที่มา

WikiPedia: ห่านแคนาดา http://www.highbeam.com/doc/1P3-2884011711.html http://ibc.lynxeds.com/species/canada-goose-branta... http://www.birds.cornell.edu/AllAboutBirds/BirdGui... http://animaldiversity.ummz.umich.edu/site/account... http://www.fws.gov/news/historic/1963/19630401.pdf http://www.arkive.org/species/ARK/birds/Branta_can... http://blx1.bto.org/birdfacts/results/bob1660.htm //doi.org/10.1656%2F045.019.0415 http://www.iucnredlist.org/apps/redlist/details/10... http://www.rspb.org.uk/birds/guide/c/canadagoose/i...