Andrew Parkinson / Red deer {Cervus elaphus} adult stag roaring during the October rut, Leicestershire, UK

Ben Hall / Red deer (Cervus elaphus) backlit at dawn with visible breath. UK. October.

Tony Heald / Red Deer (Cervus elaphus) stags fighting during the rutting season. Bushy Park, London, UK. October.

Edwin Giesbers / Red deer (Cervus elaphus) silhoutted at dusk, Richmond Park, London, England, UK. October.

Danny Green / Red Deer Stags (Cervus elaphus) fighting amongst the bracken. Bradgate Park, Leicestershire, UK, October.

Danny Green / Red deer stag (Cervus elaphus) roaring. Bradgate Park, Leicestershire, UK, October.

David Woodfall / Red Deer (Cervus elaphus) portrait of head of stag and antlers. Alladale Estate, Scotland, UK, October.

SCOTLAND: The Big Picture / RF - Red deer, (Cervus elaphus), stags silhouetted at sunset in winter, Scotland, UK.February (This image may be licensed either as rights managed or royalty free.)

SCOTLAND: The Big Picture / Red deer, (Cervus elaphus), stag silhouetted at sunset, Scotland, UK.February

SCOTLAND: The Big Picture / Red deer, (Cervus elaphus), stags silhouetted at sunset in winter, Scotland, UK.February

SCOTLAND: The Big Picture / Red deer, (Cervus elaphus), stags silhouetted at sunset in winter, Scotland, UK.February

SCOTLAND: The Big Picture / Red deer, (Cervus elaphus), stag in rough grassland, Jura, Scotland, UK., April

Oscar Dewhurst / Fallow deer (Dama dama) walking across frost-covered playing fields at dawn, with tower blocks of London in the background. Richmond Park, London, UK. December

Oscar Dewhurst / Red deer (Cervus elaphus) stag roaring, silhouetted under trees at sunrise. Bushy Park, London, UK. September

SCOTLAND: The Big Picture / Red deer (Cervus elaphus) stag in upland landscape. Lochcarron, Highlands, Scotland, UK.

SCOTLAND: The Big Picture / Red deer (Cervus elaphus) stag in upland landscape. Lochcarron, Highlands, Scotland, UK.

Guy Edwardes / Misty landscape with Red deer (Cervus elaphus) Black Mount, Highlands, Scotland, November.

Jed Weingarten / Wild Wonders of China / White-lipped deer (Cervus albirostris) stags in mountain landscape, Serxu County, Garze Prefecture, Sichuan Province, China.

Jed Weingarten / Wild Wonders of China / White-lipped deer (Cervus albirostris) male, Serxu, Garze Prefecture, Sichuan Province, China

Staffan Widstrand / Wild Wonders of China / Pere David's deer / Milu (Elaphurus davidianus) stag wading through the water of the Yangtze river, Hubei Tian'ezhou Milu National Nature Reserve, Hubei, China

Staffan Widstrand / Wild Wonders of China / Pere David's deer / Milu (Elaphurus davidianus) male walking in the morning,Hubei Tian'ezhou Milu National Nature Reserve, Shishou, Hubei, China

Staffan Widstrand / Wild Wonders of China / Pere David's deer / Milu (Elaphurus davidianus) stag, walking in the morning in Hubei Tian'ezhou Milu National Nature Reserve, Shishou, Hubei, China

Staffan Widstrand / Wild Wonders of China / Pere David's deer / Milu (Elaphurus davidianus), two stags testing their strength in Hubei Tian'ezhou Milu National Nature Reserve, Shishou, Hubei, China

Staffan Widstrand / Wild Wonders of China / Pere David's deer / Milu (Elaphurus davidianus), walking through water of Yangtze river, Hubei Tian'ezhou Milu National Nature Reserve, Shishou, Hubei, China

Paul Hobson / Red deer (Cervus elaphus) herd during rut in morning light. Derbyshire, England, UK. October.

Paul Hobson / Red deer (Cervus elaphus) stags in snowy Pine forest. Scotland, UK. March.

Axel Gomille / Red deer (Cervus elaphus) stag, Saxony, Germany. September.

Bence Mate / Fallow deer (Dama dama) at night, Gyulaj, Hungary Third place in the Nature Portfolio category of the World Press Photo Awards 2017.

Bence Mate / Fallow deer (Dama dama) at night, Gyulaj, Hungary Third place in the Nature Portfolio category of the World Press Photo Awards 2017.

Klein & Hubert / Red deer (Cervus elaphus) stag in autumn mountain landscape, Switzerland Captive.

Klein & Hubert / Red deer (Cervus elaphus) stag stretching on alpine meadow in autumn with spider web between antlers, Germany Captive.

Klein & Hubert / Red deer (Cervus elaphus) stag standing on alpine meadow in autumn with spider web between antlers and insects flying in evening light, Germany Captive.

Klein & Hubert / Red deer (Cervus elaphus) stag standing on alpine meadow in autumn with spider web between antlers, Germany Captive.

Andres M. Dominguez / Red deer (Cervus elaphus) stag and two hinds, Los Alcornocales Natural Park, southern Spain, September.

Adrian Davies / Stag beetle (Lucanus cervus) male silhouetted against leaf, controlled conditions.

Jeff Vanuga / Elk (Cervus canadensis) bull in velvet silhouetted against a setting sun, Yellowstone National Park, Wyoming, USA, May.

Ben Hall / Red deer stag (Cervus elaphus) silhouetted against sky at dusk, Cheshire, October 2014

Solvin Zankl / Stag beetle (Lucanus cervus) silhouetted against oak tree leaf. Elbe, Germany, June.

Solvin Zankl / Stag beetle (Lucanus cervus) male on oak tree. Elbe, Germany, June.

Bernard Castelein / Roe Deer (Capreolus capreolus) stag peering through vegetation, Peerdsbos, Brasschaat, Belgium, July.

Danny Green / Red deer (Cervus elaphus) stag in the snow, Scotland, March

Danny Green / Red deer (Cervus elaphus) stag in the snow, Scotland, March

Klein & Hubert / Red deer (Cervus elaphus) stag calling in snowy mountains forest, portrait, Germany

Klein & Hubert / Red deer (Cervus elaphus) stag walking in snow, Germany