Orsolya Haarberg / Norway spruce (Picea abies) trees covered in snow, Ciuc Mountains, Transylvania, Romania, January 2015.
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Erlend Haarberg / Frost covered European beech tree (Fagus sylvatica) in a snow covered field framed by frosty branches, Calonda, Harghita County, Transylvania, Romania, January.
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Nick Garbutt / Sun beam at sun rise over the Grand Canyon of the Yellowstone, Yelllowstone National Park, Wyoming, USA. January 2016.
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Pal Hermansen / Whooper swans (Cygnus cygnus) flock in spring, Lake Tysslingen, central Sweden March
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Matthew Maran / European robin (Erithacus rubecula) Hampstead Heath, London, England, UK. January.
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Danny Green / Atlantic Puffin (Fratercula arctica) flock resting on a snow bank, Hornya, Varanger, Norway, April
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Carol Walker / RF - Grey Andalusian mare running in snow, Berthoud, Colorado, USA. January. (This image may be licensed either as rights managed or royalty free.)
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Matthew Maran / Avenue of trees in snow with benches, Kenwood Estate, Hampstead Heath, London, England, January 2013.
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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
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Andres M. Dominguez / Portuguese oak tree leaf (Quercus faginea) and Blackberry leaf (Rubus fruticosa) leaf in ice, Sierra de Grazalema Natural Park, southern Spain, February.
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Markus Varesvuo / Male Black grouse (Tetrao / Lyrurus tetrix) in snow, Utajarvi, Finland, May.
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Eric Baccega / Nenet herders travel by Reindeer (Rangifer tarandus) sled on spring migration across tundra. Yar-Sale district, Yamal, Northwest Siberia, Russia. April 2016.