• 

  Category:Lagopus lagopus – Wikimedia Commons

  https://commons.wikimedia.org/wiki/Category:Lagopus_lagopus?uselang=de

  Keine Beschreibung vorhanden.

• 

  Mammal Species of the World - Browse: Ursidae

  http://www.departments.bucknell.edu/biology/resources/msw3/browse.asp?id=14000939

  Mammal Species of the World: Information on Ursidae

• 

  Mammal Species of the World - Browse: groenlandicus

  http://www.departments.bucknell.edu/biology/resources/msw3/browse.asp?id=13000190

  Mammal Species of the World: Information on groenlandicus

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