Theo Bosboom / Common blue damselflies (Enallagma cyathigerum) flying over the water to rest on plant stem, in a fen, Hondeven, Holland, July

Theo Bosboom / Common blue damselflies (Enallagma cyathigerum) flying over the water to rest on plant stem, in a fen, Hondeven, Holland, July

Andrew Parkinson / Mute swan (Cygnus olor) adult emerges serenely from a thick mist into dawn sunlight, Derbyshire, UK, May.

Jeff Rotman / Free diver exploring blue water beside coral reef, Sinai, Egypt, Red Sea Model released Model released.

Pascal Tordeux / Farmland after harvest, with blue sky and clouds, Roucy, Champagne, France, August 2018.

Pascal Tordeux / Farmland with straw bales, Le Herie La Vieville, Picardy, France, July 2018.

Alex Hyde / Beech (Fagus sylvatica) woodland in spring, at dawn, Peak District National Park, Cheshire, UK, May.

Florian Möllers / Colourful sunset at the Wadden Sea coast of 'Uthorn' Nature Reserve, List, Island of Sylt, Wadden Sea National Park, UNESCO World Heritage Site, Germany.

Floris van Breugel / Moonrise over the flooded Alvord Desert with photographer Floris van Breugel watching the sky. Long exposure. Harney County, Oregon. January 2010

Theo Bosboom / Calm landscape with three types of trees, European Rowan (Sorbus aucuparia) on the left, Pine (Pinus) trees on the island, and the birch (Betula sp) with Ivy (Hedera sp) growing on the right, close t...

Theo Bosboom / Common blue damselflies (Enallagma cyathigerum) resting on plant stem in a fen, Hondeven, east Holland, August

Theo Bosboom / Two common blue damselflies (Enallagma cyathigerum) resting on plant stem, in a fen, Hondeven, Holland, July