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.

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), 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.

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

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

Andy Rouse / Red deer (Cervus elaphus) stag during rut, Wales, UK. September. Captive in deer park.

Andy Rouse / Red deer (Cervus elaphus) stag silhouetted at dusk, Wales, UK. Captive in deer park.

David Tipling / Red deer (Cervus elaphus) stag during rut on a misty dawn in Richmond Park National Nature Reserve, London, UK, October.

Juan Carlos Munoz / Fallow deer (Dama dama) stags, captive, Cabarceno Park, Cantabria, Spain, June.

Mark MacEwen / Elk (Cervus canadensis) stag resting outside house during the rut, Estes Park, Larimer County, Rocky Mountains, Colorado, United States, September.

Ben Hall / Red deer (Cervus elaphus) stags fighting at dusk during rutting season, Cheshire, UK October

Bertie Gregory / 2020VISION / Red deer (Cervus elaphus) stags fighting during rut, Richmond Park, London, England, UK, October. Did you know? Richmond Park deer herds are descended from historic medieval royal hunting stock.

Bertie Gregory / 2020VISION / Red deer (Cervus elaphus) stags fighting during rut, Richmond Park, London, England, UK, October