Jack Dykinga / Bighorm sheep (Ovis canadensis) males grouped together before the rutting season. Valley of Fire State Park, Nevada, USA, February.

Ingo Arndt / Racka sheep herd {Ovis aries} rare breed from Hungary

Ingo Arndt / Bison bull {Bison bison} Yellowstone NP, Wyoming, USA

Ingo Arndt / Alpine ibex male {Capra ibex ibex} Switzerland

Neil Aldridge / Black rhinoceros (Diceros bicornis) feeding in early morning light, Kariega Game Reserve. South Africa.

Niall Benvie / Black faced sheep ram with twisted horns, Mull, Scotland, UK. January.

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

MYN / Corne van der Linden / Wolf spider (Venator immansueta) Perth, South-Western Australia.

MYN / Corne van der Linden / Variety of orchids from the Banksia Woodland, Swan Coastal Plain. Including Pansy orchid (Diuris magnifica), Slender sun orchid (Thelymitra vulgaris), Cowslip orchid (Caladenia flava), Plain sun orchi...

Laurent Geslin / Two Alpine Ibex (Capra Ibex ibex) with impressive horns in mist, Alps, France

Laurent Geslin / Group of Alpine Ibex (Capra Ibex ibex) on misty mountain, Alps, France

Laurent Geslin / Alpine Ibex (Capra Ibex ibex) scratching bottom, Alps, France