Sebastian Kennerknecht / American Bison (Bison bison) female covered with frost in winter, Yellowstone National Park, Montana

Jack Dykinga / Twisted Saguaro cactus (Carnegiea gigantea) Catalina State Park, near Tucson, Arizona, USA, September.

Robert Thompson / Hawthorn berries (Crataegus monogyna) Brackagh Moss NNR, Portadown, Co. Armagh, Northern Ireland.

Jack Dykinga / ARCHIVED SG - Duplicate 10/10/2017. Saguaro cactus (Carnegiea gigantea) at sunset, with drooping frost damaged limbs, South Maricopa Mountains Wilderness, Sonoran Desert National Monument, Arizona...

Alastair MacEwen / Timelapse of frost forming on European beech (Fagus sylvatica) leaves, controlled conditions, Somerset, England, UK.

Alastair MacEwen / Timelapse of frost forming on Rose (Rosa) hips, controlled conditions, Somerset, England, UK.

Floris van Breugel / First rays of golden sunshine hit Giant Sequoias (Sequoiadendron giganteum) covered in a winter blanket of snow and frost, Grant Grove, Sequoia / Kings Canyon National Park, California, USA November

Floris van Breugel / First rays of golden sunshine hit Giant Sequoias (Sequoiadendron giganteum) covered in a winter blanket of snow and frost, Grant Grove, Sequoia / Kings Canyon National Park, California, USA November

Floris van Breugel / First rays of golden sunshine hit Giant Sequoias (Sequoiadendron giganteum) covered in a winter blanket of snow and frost, Grant Grove, Sequoia / Kings Canyon National Park, California, USA November

Floris van Breugel / First rays of golden sunshine hit Giant Sequoias (Sequoiadendron giganteum) covered in a winter blanket of snow and frost, Grant Grove, Sequoia / Kings Canyon National Park, California, USA November

Jussi Murtosaari / European Dipper (Cinclus cinclus) on ice next to stream, winter, Finland. February.

Andres M. Dominguez / Fly agaric mushrooms (Amanita muscaria) in snow, Los Alcornocales Natural Park, Cortes de la Frontera, southern Spain, January.