Jussi Murtosaari / Northern Hawk-Owl (Surnia ulula) in frosty tree, central Finland, January.

Pete Cairns / U shaped valley and Loch Avon, Grampian Mountains, Scotland, November 2007.

Kirkendall-Spring / Snow covered trees on Amabilis Mountain in the Okanogan-Wenatchee National Forest, Cascade Mountains, Washington, USA, January 2013.

Kirkendall-Spring / Cross-country skier and snow covered trees on Amabilis Mountain in the Okanogan-Wenatchee National Forest, Cascade Montains, Washington, USA, January 2013. Model released.

Kirkendall-Spring / Snow covered trees on Amabilis Mountain in the Okanogan-Wenatchee National Forest, Cascade Mountains, Washington, USA, January 2013.

Kirkendall-Spring / Snow covered trees on Amabilis Mountain in the Okanogan-Wenatchee National Forest, Cascade Mountains, Washington, USA, January 2013.

Kirkendall-Spring / Cross-country skier and snow covered trees on Amabilis Mountain in the Okanogan-Wenatchee National Forest, Cascade Montains, Washington, USA, January 2013. Model released.

Philippe Clement / Snow and hoar frost covered Birch trees (Betula sp) in winter against blue sky, February

Diane McAllister / Japanese Macaque (Macaca fuscata) perched on the open warm section of a rocky hillside, takes in the last rays of the late afternoon sun in Jigokudani, Japan.

Diane McAllister / Japanese Macaque (Macaca fuscata) female standing on hind legs in snow, Jigokudani, Japan. February

Pal Hermansen / Tree growing from inside abandoned car in 'car graveyard' Bastnas, Sweden, December

Pal Hermansen / Rear view of old abandoned car covered in snow, in 'car graveyard', Bastnas, Sweden. December