Jeff Vanuga / Elk (Cervus canadensis) bull in velvet silhouetted against a setting sun, Yellowstone National Park, Wyoming, USA, May.

Donald M. Jones / White-tailed Deer (Odocoileus virginianus) buck, central Montana

Fabrice Cahez / Morning mist over the countryside, Aubrac, France, July 2015.

Mark MacEwen / Firefly squid (Watasenia scintillans) close to beach during mating season. Toyama Bay, Japan.

Mark MacEwen / Japanese firefly (Luciola cruciata) light trails at night above stream in rural Japan. June.

Espen Bergersen / Two Svalbard reindeer (Rangifer tarandus platyrhychus) Svalbard, Norway, April.

Pete Oxford / Woman inside Nyshi Long House, Nyshi Tribe, Arunachal Pradesh.North East India, November 2014.

Angelo Gandolfi / White stork (Ciconia ciconia), nesting colony to provide alternative nesting area whilst the building they normally nest on is under repair. Extremadura, Spain, April.

Neil Aldridge / Urban Red fox (Vulpes vulpes) searching for food near bins in a courtyard at night, West London, United Kingdom, May 2014. Finalist in the Urban category of the Wildlife Photographer of the Year Awar...

Sven Zacek / Eilean Donan Castle lit up at twilight with dark clouds. Scotland, UK, September 2013.

Juan Carlos Munoz / Tourists looking down onto underground stream, from illuminated pathway, Skocjan Caves, Green Karst, Slovenia, October 2014.

Andy Rouse / Great crested grebe (Podiceps cristatus cristatus) courtship dance, Cardiff, UK, March.