Uri Golman / Head portrait of photographer Uri Golman in temperatures of -40 degrees celsius, with frost in his beard. Greenland. March 2009. Model released

Doug Allan / Emperor penguin males incubating eggs huddle for warmth at -40 degrees centigrade, winter, Antarctica. Green is excrement on snow. {Aptenodytes forsteri}

Doug Allan / Emperor penguin {Aptenodytes forsteri} males huddle for warmth in minus 40 degrees centigrade while incubating eggs in winter, Antarctica Winter extreme cold survival birds seabirds nesting-behaviour

Anup Shah / Eastern chimpanzee (Pan troglodytes schweinfurtheii) female 'Gremlin' aged 40 years holding her daughter 'Glitter's' baby daught aged 2 months and her own infant son aged 2 years. With 'Glitter' aged...

Fiona Rogers / Eastern chimpanzee (Pan troglodytes schweinfurtheii) female 'Gremlin' aged 40 years holding female baby aged 2, her granddaughter. Gombe National Park, Tanzania. Gremlin took the new born baby from he...

Fiona Rogers / Eastern chimpanzee (Pan troglodytes schweinfurtheii) female 'Gremlin' aged 40 years calling while holding her baby granddaughter aged 2 months and her own infant son aged 2 years. Gombe National Park,...

Markus Varesvuo / Close-up of head and wing of White-tailed Eagle (Haliaetus albicilla) in flight, Sodankyls, Lokka, Finland, April

Markus Varesvuo / White-tailed Eagle (Haliaetus albicilla) in flight, Norway, August

Markus Varesvuo / Stock Dove (Columba oenas) in flight, Helsinki, Finland, March

Markus Varesvuo / Red-throated Diver (Gavia stellata) adult with two young chicks on water, Vaala, Finland, June

Markus Varesvuo / Red-throated Diver (Gavia stellata) on water, cleaning feathers, Vaala, Finland, June

Markus Varesvuo / Adult Red-throated Diver (Gavia stellata) on water with chick, Vaala, Finland, June