Ingo Arndt / Caddisfly (Limnephilidae) case built out of sticks and bark fragments, Germany, November.

Ingo Arndt / Caddisfly (Limnephilus sp.) case built of sticks, wood fragments, seeds, snail shells and plant stems, Germany, November.

Ingo Arndt / Reed Warbler (Acrocephalus scirpaceus) nest in Senckenberg Natural Hystory Collection Dresden, Germany.

Ingo Arndt / Common Moorhen (Gallinula chloropus) nest from Germany in collection at Uebersee-Museum, Bremen, Germany.

Ingo Arndt / Common Moorhen (Gallinula chloropus) nest from Germany in collection at Uebersee-Museum, Bremen, Germany.

Ingo Arndt / Harvest Mouse (Micromys minutus) nest, Germany.

Ingo Arndt / Baya weaver (Ploceus philippinus) male flying to nest entrance, Singapore

Alex Hyde / Porcelain fungus (Oudemansiella mucida) gills. Peak District National Park, Derbyshire, UK. October.

Robert Thompson / Four spotted chaser (Libellula quardrimaculata) Montiaghs Moss NNR, Aghalee, County Antrim, Northern Ireland, June.

Alex Mustard / Backlit detail of branching fire coral (Millepora alcicornis) showing the hair like polyps, filled with stinging nematocysts. East End, Grand Cayman, Cayman Islands. Caribbean Sea.

Juan Carlos Munoz / Palm tree branch dipping towards water, Puerto Jimenez, Golfo Dulce, Osa Peninsula, Costa Rica.

Juan Carlos Munoz / Hut in Lavender (Lavandula angustifolia) fields, Valensole Plateau, Alpes Haute Provence, France, June 2015.