Jack Dykinga / Bighorm sheep (Ovis canadensis) males grouped together before the rutting season. Valley of Fire State Park, Nevada, USA, February.
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Neil Aldridge / Five orphaned White rhinoceros (Ceratotherium simum) calves feed from a trough at dusk at the Rhino Revolution orphanage near Hoedspruit, South Africa. The mothers of these rhinos were killed by poach...
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Donald M. Jones / American Bison (Bison bison) with grass on horns, National Bison Range, Montana
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Ann & Steve Toon / Pied crows (Corvus albus) perched on horns of antelope skull. Zimanga Private Game Reserve, KwaZulu-Natal, South Africa.
Ingo Arndt / Alpine ibex male {Capra ibex ibex} Switzerland
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Neil Aldridge / White rhinoceros (Ceratotherium simum) female 'Thandi' silhouetted against the sunset, Kariega Game Reserve. South Africa. Thandi's horns were taken in a brutal attack by poachers.
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Neil Aldridge / Black rhinoceros (Diceros bicornis) feeding in early morning light, Kariega Game Reserve. South Africa.
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Niall Benvie / Black faced sheep ram with twisted horns, Mull, Scotland, UK. January.
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Wim van den Heever / Blue wildebeest (Connochaetes taurinus) herd silhouetted against the rising sun with clouds in the background. Greater Kruger National Park, South Africa
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Edwin Giesbers / European bison (Bison bonasus) close up portrait showing horns, Zuid-Kennemerland National Park, the Netherlands. January. Reintroduced species.