Andy Rouse / Sunrise in forest, silhouetting trees. Ranthambhore Tiger Reserve, India.

Steve O. Taylor (GHF) / Loss of topsoil in deforested land, Central Kalimantan, Indonesian Borneo. June 2010.

Ole Jorgen Liodden / Polar bear (Ursus maritimus) footprints in snow, on cracked ice, Svalbard, Norway, September.

Markus Varesvuo / Whooper Swan (Cygnus cygnus) standing in snowfall,Hokkaido, Japan, February

Jabruson / African forest elephant (Loxodonta africana cyclotis) footprint in drying mud, Romani Bai, Odzala-Kokoua National Park, Democratic Republic of Congo.

Peter Cairns / Mangerstadh beach, Isle of Lewis, Scotland, April 2013.

Jean E. Roche / Flooded petrol station in Arles city flooded by the Rhone in December 2003. Camargue, France.

Eric Medard / Little owl (Athene noctua) on water pump in garden, taken at night with infra red remote camera trap, Mayenne, Pays de Loire, France.

Ernie Janes / Oystercatcher (Haematopus ostralegus) footprints on sand at low tide, Norfolk, England, UK, November.

Adrian Davies / Trail left in a Bramble leaf by the larvae of a Pygmy eyecap moth (Stigmella aurella), scanned on a flatbed scanner, Surrey, England, UK.

Juergen Freund / Aerial view of the flooded Lake Eyre National Park. South Australia, June 2011

Jen Guyton / White-backed vultures (Gyps africanus) and spotted hyenas (Crocuta crocuta) squabble over the drying and deflated skin of an elephant carcass (Loxodonta africana), Laikipia Plateau, Kenya. The hyenas...

Merryn Thomas / Dusk on Old Quay, St. Martin's Flats, with buoy in shallows. St. Martin's, Isles of Scilly. England. May 2013.

Kirkendall-Spring / Cross country ski tracks on Amabilis Mountain, Mount Baker-Snoqualmie National Forest, Washington, USA. December

Pascal Tordeux / Tyre tracks in sand on beach as low tide, Crotoy, Somme Bay, Pas de Calais, France, July 2015.

Lisa Hoffner / Elephant radio collars on the ground at sunrise, Samburu National Reserve, Kenya.

Tui De Roy / Green turtle (Chelonia mydas) tracks from nesting females on beach, Galapagos

John Cancalosi / Syenite from the Steffin Complex, Marathon County, Wisconsin, USA. Syenite is a coarse-grained intrusive igneous rock of the same general composition as granite but with the quartz either absent or pr...

Jouan Rius / Irregular ripples on gypsum sand dunes created by high winds, White Sands National Park, Chihuahuan Desert, New Mexico, USA, December 2012.

Andrew Parkinson / Arctic tern (Sterna paradisaea) chick calls impatiently for food from its absent parents, July, Farne Islands, UK. July

Mark Carwardine / White-lipped tree viper (Trimeresurus albolabris) waiting with its head down ready to strike frog, bird or small mammal prey, captive, from forests and plantations in southern China to India and south...

Stephen Dalton / Peppered moth [Biston betularia} normal grey form and dark melanistic form. Dark form is better camouflaged in areas of pollution where lichen is absent, UK

Doug Perrine / Dead embryo of Bottlenose dolphin showing hairs on beak (absent in adults) {Tursiops truncatus}

Paul D Stewart / Illustration from 'The Anniversary of the Literary Fun 1836' by Thomas Hood, published by Baily and Co, Cornhill. The reputation of academics for absent mindedness, eccentricity, and absorbtion in the...

Tui De Roy / People from local community holding Leatherback turtle (Dermochelys coriacea) hatchlings, a conservation effort to keep them safe during the day and release them at night when avian predators are abse...

Tui De Roy / People from local community holding Leatherback turtle (Dermochelys coriacea) hatchlings, a conservation effort to keep them safe during the day and release them at night when avian predators are abse...

Sirachai Arunrugstichai / Newborn Bull sharks (Carcharhinus leucas) are laid on the floor for display during auction at a landing site in Ranong Province, Thailand, April 2015. Majority of sharks recorded at landing sites...