Nick Garbutt / Sun beam at sun rise over the Grand Canyon of the Yellowstone, Yelllowstone National Park, Wyoming, USA. January 2016

Alan Murphy/ BIA / Boreal Chickadee (Poecile hudsonicus) in pine, Alaska

Floris van Breugel / Bristlecone pine (Pinus aristata) abstract view of exposed and weathered wood layers, White Mountains, California, USA July

Floris van Breugel / Ancient Bristlecone pine (Pinus aristata) clings to life, with a grand view of endless sage valleys, White Mountains, California, USA, July

Floris van Breugel / Camping in Big Pine Lakes, Sierra Nevada, Sequoia National Park, California, USA, May

Niall Benvie / Scots pines (Pinus sylvestris) Torridon, Scotland, UK, November.

David Pattyn / Alpine ibex (Capra ibex) on a mountain side in autumn with European larch tree (Larix decidua) trees in the back the Alps, Gran Paradiso National Park, Italy. November.

Orsolya Haarberg / Snow covered Norway spruce (Picea abies) trees at the treeline, Stubba Nature Reserve, Laponia, Sweden, February 2013.

Orsolya Haarberg / Snow covered Norway spruce (Picea abies) forest on Mount Harghita Madaras, Carpathian Mountains, Transylvania, Romania, January 2015.

Orsolya Haarberg / Norway spruce (Picea abies) trees covered in snow, Ciuc Mountains, Transylvania, Romania, January 2015.

Erlend Haarberg / Norway spruce trees (Picea abies) covered in snow and frost, at sunrise, Mellan-Stubba, Stubba Nature Reserve, Lapland, Sweden, February 2013.

Andy Trowbridge / Capercaillie (Tetrao urogallus) male displaying in Scots pine tree (Pinus sylvestris) Southern Norway. May.