Kerstin Hinze / Male Capercaillie (Tetrao urogallus) displaying, Berchtesgaden National Park, Bavarian Alps, Germany, April.

Kerstin Hinze / Male Capercaillie (Tetrao urogallus) displaying, Berchtesgaden National Park, Bavarian Alps, Germany, April.

Nick Garbutt / Andean cock-of-the-rock (Rupicola peruvianus), male displaying at lek in tree. Manu Biosphere Reserve, Amazonia, Peru.

SCOTLAND: The Big Picture / Capercaillie (Tetrao urogallus) feeding in a Scots pine tree (Pinus sylvestris), Cairngorms National Park, Scotland, UK, February.

Markus Varesvuo / Female Capercaillie (Tetrao urogallus) with newly hatched chick on nest, Kuhmo, Finland, June.

Markus Varesvuo / Female Capercaillie (Tetrao urogallus) ready to mate, Vaala, Finland, May.

Markus Varesvuo / Male Capercaillie (Tetrao urogallus) flying, Jalasjarvi, Finland, April.

Markus Varesvuo / Male Capercaillie (Tetrao urogallus) display jumping, Vaala, Finland, May.

Markus Varesvuo / Capercaillie (Tetrao urogallus) chicks huddled together, Kuhmo, Finland, June.

Markus Varesvuo / Female Capercaillie (Tetrao urogallus) with three chicks, Kuhmo, Finland, June.

Markus Varesvuo / Golden eagle (Aquila chrysaetos) plucking Capercaillie (Tetrao urogallus) Kuusamo, Finland, April.

Markus Varesvuo / Two Capercaillie (Tetrao urogallus) chicks, Vaala, Finland, June.