David Pattyn / Golden eagle (Aquila chrysaetos) in flight in front of a vertical rocky mountain side, Gran Paradiso National Park, Aosta Valley, Italy, May

Gabriel Rojo / Wild puma (Puma concolor) walking across rocks, profile, Torres del Paine National Park, Chile.

Richard Du Toit / Mountain Zebra (Equus zebra) trio in savanna, Mountain Zebra National Park, South Africa

Eric Baccega / Spirit Island, Maligne Lake, Jasper National Park, Rocky Mountains, Alberta, Canada, September 2009

Ben Cranke / Snow leopard (Uncia uncia) walking down snow covered slope, Hemas National Park, Ladakh, India. Winner of the Long Lens catergory in the Melvita Nature Images Awards competition 2014.

Sumio Harada / Mountain Goat (Oreamnos americanus) males in snow, Glacier National Park, Montana

Tim Fitzharris / Mount Rundle, Johnson Lake, Banff National Park, Alberta, Canada

Orsolya Haarberg,Orsolya Haarberg / Alpine ibex (Capra ibex) in snowing conditions, the Alps, Gran Paradiso National Park, Italy. October 2008

Gavin Hellier / Wenkchemna Peaks or Ten Peaks rising over Moraine lake in the snow, near Lake Louise, Banff National Park, Alberta, Canada, 2007

Gavin Hellier / Wenkchemna Peaks or Ten Peaks rising over Moraine lake in the snow, near Lake Louise, Banff National Park, Alberta, Canada, 2007

Gavin Hellier / Peyto Lake, coloured by glacial silt, Banff-Jasper National Parks, Alberta, Canada, 2007

Tim Fitzharris / Mount Rundle and Johnson Lake, Banff National Park, Alberta, Canada