Kirkendall-Spring / John Day Fossil Beds National Monument, Painted Hills Unit, Oregon, USA, May 2013.

Floris van Breugel / Syncronous Fireflies (Photinus carolinus) illuminate the lush forests of Smoky Mountains National Park, Tennesse, USA, July

Theo Bosboom,Theo Bosboom / Abstract reflections of reed and clouds in the water, Texel, the Netherlands, April

Yukihiro Fukuda / Japanese fireflies (Luciola cruciata) in flight at night, Japan endemic species, Nichinan-chou, Tottori, Japan, July

Sandra Bartocha / Porcelain fungus (Oudemansiella mucida) close-up, Germany, October

Sandra Bartocha / Forest view of trunks of Scots Pine (Pinus sylvestris), Downy European white birch (Betula pubescens) and European Beech (Fagus sylvatica) trees, Muritz National Park, Germany, November

Jack Dykinga / Colorado River Delta, with watercourse sculpted patterns eroded into the salt / silt flats near the Sea of Cortez, La Reserva del Golfo, Baja, Mexico

Juan Carlos Munoz / Abstract of reeds in front of lake with reflections, Plitvice Lakes National Park, Lika, Croatia, Europe, October 2011

Erlend Haarberg / Aerial view of river flowing into the sea, Landeyjarsandur, South coast of Iceland, September 2010

Alex Mustard / Peacock flounder (Bothus lunatus) resting on the seabed, East End, Grand Cayman, Cayman Islands, British West Indies, Caribbean Sea.

Graham Eaton / View of frozen Llynnau Mymbyr, a mountain lake, with fog partly revealing a mountain ridge, Snowdonia NP, Gwynedd, Wales, UK, December

Inaki Relanzon / Remarkable Rocks at night, Flinders Chase National Park, Kangaroo Island, South Australia State, Australia, September 2011.