A large black game bird found in European forests, related to grouse, known for its dramatic mating display.
From Scottish Gaelic 'capercaillie' meaning 'horse of the woods'—'capall' (horse) plus 'coille' (woods). First documented in English in the 16th century.
Male capercaillies perform one of nature's most bizarre mating dances—they strut around making popping sounds, hissing, and spinning while nearly deaf to danger!
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