The capercaillie is on the  UK red list of birds of high conservation concern, BTO Bird Facts:

SNH have now rightly  emphasised the  importance of  woodlands in Strathspey for the survival of  this magnificent bird in Scotland, see The Scotsman article:

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Cock capercaillie photographed in Deeside where capercaillie  have now become extremely rare. Copyright 2011BSCG.