Axel Gomille / Wolf (Canis lupus), sitting in front of wrecked tank, military training area, Saxony-Anhalt, Germany

Guy Edwardes / Dawn mist around Hambledon Hill from Bullbarrow Hill, Cranbourne Chase, Dorset, England, UK. February 2016.

Bernard Castelein / Remnants of old military railway, Klein Schietveld, Brasschaat, Belgium, July 2013.

Gavin Hellier / Timelapse from day to night looking towards the Peter and Paul Fortress, St, Petersburg, Russia, May 2016. Hellier

Doug Perrine / Barjacks (Caranx ruber), Yellowtail snapper (Ocyurus chrysurus), and Sergeant major damselfish (Abudefduf saxatilis) swimming around wreck of bow gun on C-58 shipwreck off Puerto Morelos, near Cancun,...

Ernie Janes / Abstract photo of Tower Bridge, with blurred motion red bus, London, June 2013. Digitally manipulated.

Shattil & Rozinski,Shattil & Rozinski / Mule deer (Odocoileus hemionus), with the Denver skyline and Rocky Mountains in the background, Denver, Colorado, USA, November.

Paul Harcourt Davies,Paul Harcourt Davies / Poppies (Papaver rhoeas) in flower, growing near the military cemetry, Bolsena, Italy. Taken with fisheye lens

Michael Pitts / Eastern Island showing the WW2 airstrip which was used to launch the initial attack on the Japanese fleet for the Battle of Midway, Midway, Central Pacific.

Bert Willaert / Natterjack toad (Epidalea calamita / Bufo calamita) next to an empty bullet cartridge on military land, Belgium, June.

Florian Möllers / House sparrow (Passer domesticus) breeding in the cannon tube of a tank at the Russian War Monument, Unter den Linden, Berlin, Germany, June 2007

Solvin Zankl / Military Orchid (Orchis militaris) flowering on side of road with light trails from cars, Germany