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BirdLife International. 2004. Birds in Europe: population estimates, trends and conservation status. BirdLife International, Cambridge, U.K. IUCN. 2012. IUCN Red List of Threatened Species (ver. 2012.1). Available at: http://www.iucnredlist.org. (Accessed: 19 June 2012). Moss, R.; Oswald, J.; Baines, D. 2001. Climate change and breeding success: decline of the capercaillie in Scotland. Journal of Animal Ecology 70: 47-61. |
| Citation: | BirdLife International 2012. Tetrao urogallus. In: IUCN 2012. IUCN Red List of Threatened Species. Version 2012.2. <www.iucnredlist.org>. Downloaded on 20 May 2013. |
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