Mark Hamblin / 2020VISION / Two male Black grouse (Tetrao tetrix) fighting at lek site, with mountain backdrop, Cairngorms NP, Scotland, UK, April 2010
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Bob Steele / Sage Grouse (Centrocercus urophasianus) male displaying to female at lek, Mono County, California
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Roger Powell / Rear view of Ruff (Philomachus pugnax) in full display at the lek. Varanger, Finmark, Norway, May.
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Roger Powell / Satellite male Ruff (Philomachus pugnax) in full display at the lek. Varanger, Finmark, Norway, May.
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Markus Varesvuo,Markus Varesvuo / Two male Black grouse (Lyrurus tetrix) displaying at lek, Utajarvi, Finland, April.
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Markus Varesvuo,Markus Varesvuo / Two male Black grouse (Lyrurus tetrix) displaying at lek, Utajarvi, Finland, April.
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Markus Varesvuo,Markus Varesvuo / Two male Black grouse (Lyrurus tetrix) displaying at lek, Kuusamo, Finland, April.
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Mark Hamblin / 2020VISION / Silhouette of two male Black grouse (Tetrao tetrix) displaying at lek at dawn, Cairngorms NP, Grampian, Scotland, UK, April. 2020VISION Book Plate.
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Orsolya Haarberg / Male Capercaillie (Tetrao urogallus) displaying, Bergslagen, Sweden, April
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Orsolya Haarberg / Two Black grouse (Tetrao tetrix) males displaying at lek, Bergslagen, Sweden, April
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Markus Varesvuo / Male Black grouse (Lyrurus tetrix) in flight, displaying at lek, Liminka, Finland, April
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Martin Willis / Victoria's Riflebird (Ptiloris victoriae) male displaying for female on vine lek, Malanda, Queensland, Australia
