Emanuele Biggi / Bird-dropping spider (Phrynarachne decipiens) camouflaged on web on leaf to mimic bird faeces, Borneo.

Emanuele Biggi / Bird-dropping spider (Phrynarachne decipiens) feeding on fly, camouflaged on web on leaf to mimic bird faeces, Borneo.

Emanuele Biggi / Bird-dropping spider (Phrynarachne decipiens) camouflaged on web to look like bird faeces, Borneo.

Emanuele Biggi / Bird-dropping spider (Phrynarachne decipiens) camouflaged on web to look like bird faeces, Borneo.

Emanuele Biggi / Bird-dropping spider (Phrynarachne decipiens) camouflaged on web to look like bird faeces, Borneo.

Emanuele Biggi / Spider (Phrynarachne rugosa) with rough appearance resembling lichen, Andasibe, Madagascar

Emanuele Biggi / Spider (Phrynarachne rugosa) with rough appearance resembling lichen, Andasibe, Madagascar

Emanuele Biggi / Spider (Phrynarachne rugosa) Andasibe, Madagascar

Emanuele Biggi / Bird-dropping spider (Phrynarachne decipiens), this spider is a dung mimic itself, and also adds dead prey to web to increase dung like appearance, Poring Hot Springs, Sarawak, Borneo

Emanuele Biggi / Bird-dropping spider (Phrynarachne decipiens), this spider is a dung mimic itself, and also adds dead prey to web to increase dung like appearance, Poring Hot Springs, Sarawak, Borneo

Chien Lee / Bird-dropping Crab Spider (Phrynarachne decipiens) on silken pad it has made to resemble the stain of bird excrement to attract flies, Kubah National Park, Sarawak, Borneo, Malaysia

Chien Lee / Bird-dropping Crab Spider (Phrynarachne decipiens) mimicking scat both visually and by smell, Bau, Malaysia

Ashley Cooper / Grave of Sir Ernest Shackleton at Grytviken cemetary on South Georgia. February 2014

Yva Momatiuk & John Eastcott / Old church and cemetary, Grafarkirkja, Iceland

Kerstin Hinze / Roe deer (Capreolus capreolus), between gravestones in cemetary, Vienna, Austria, April.

Pascal Kobeh / Diver shining torch on the bones and jaws of equidae or equine animals that might be 16,000 years old, Cenote Pet Cemetary, Yucatan peninsula, Mexico

Pascal Kobeh / Divers at the surface looking to the scenery before diving in the Cenote Pet Cemetary, Yucatan Peninsula, Mexico

Adrian Davies / Lichens including Xanthoria parietina and Ochrolechia parella on tombstones in village churchyard. Slapton, Devon, England, UK, July 2013.

Pat Tuson / 'Innvertebrate' the Boutique Bug Hotel or Insect House situated amongst gravestones, Bunhill Fields Burial Ground or Cemetery with flats behind and people on balcony, London Borough of Islingt...

Pat Tuson / 'Innvertebrate', the Boutique Bug Hotel or Insect House situated amongst gravestones, Bunhill Fields Burial Ground or Cemetery, London Borough of Islington, London, England, UK

Pat Tuson / 'Innvertebrate', the Boutique Bug Hotel or Insect House situated amongst gravestones, Bunhill Fields Burial Ground or Cemetery, London Borough of Islington, London, England, UK

Gavin Hellier / Elevated view over the city and war cemetary at Sarajevo, Bosnia and Herzegovina, Balkans 2007

Gavin Hellier / Elevated view over the city and war cemetary at Sarajevo, Bosnia and Herzegovina, Balkans 2007

Gavin Hellier / Uniformed men marching at Revolutionary Martyrs' Cemetary, Democratic Peoples' Republic of Korea (DPRK), North Korea, April 2012