Peter

Do you mean these birds?

The Capercaillie (Tetrao urogallus), also known as the Wood Grouse or more specifically Western Capercaillie is the largest member of the grouse family. Found across northern Europe and Asia, it is reknowned for its mating display.

Also spelt Capercailzie, its name in English is derived from the Gaelic capull coille, meaning "horse of the woods". It is known in German as Auerhuhn and French as Grand Tetras.