Jack Dykinga / Burrowing owl (Athene cunicularia), two huddled together. Marana, Pima County, Arizona, USA.

Guy Edwardes / Pulpit Rock, Isle of Portland, Dorset, England, UK. December 2010.

Gabriel Rojo / Yatay palm / jelly palm (Batia yatay) trees silhouetted at sunset, El Palmar National Park, Entre Rios Province, Argentina

Juan Carlos Munoz / Quiver tree (Aloe dichotoma) Kokerboom Forest, Nieuwoudtville, Namaqualand, Northern Cape province, South Africa, September 2012.

Kristel Richard / An Einsiedler / Swiss warmblood mare (Equus caballus) cantering, Schwyz, Switzerland, July.

Petra Wegner / Cavalier King Charles Spaniel, male puppy with tricolor coat , aged 3 months, at garden fence

Steven David Miller / Eastern grey kangaroo (Macropus giganteus) male scratching stomach, Grampians National Park, Victoria, Australia. December.

Ashley Cooper / A 'Drunken forest' in Fairbanks, Alaska where trees are collapsing into the ground due to global warming induced permafrost melt. Alaska, USA, September 2004

Ashley Cooper / A 'Drunken forest' in Fairbanks, Alaska where trees are collapsing into the ground due to global warming induced permafrost melt. Alaska, USA, September 2004

Ashley Cooper / Electric pylons in Fairbanks, Alaska collapsing into the ground due to global warming induced permafrost melt. Alaska, USA. August 2004

Ashley Cooper / A 'Drunken forest' in Fairbanks, Alaska where trees are collapsing into the ground due to global warming induced permafrost melt. Alaska, USA, September 2004

Ashley Cooper / A 'Drunken forest' in Fairbanks, Alaska where trees are collapsing into the ground due to global warming induced permafrost melt. Alaska, USA, August 2004