Solvin Zankl / Honey bee (Apis mellifera), bees can link up to form a bridge, however in this image the bridge has just collapsed leaving just three bees linked. Kiel, Germany, June.

Jack Dykinga / Rain spattered inter-locking palm leaves create a design of pattern and colour in the tropical rainforest. Osa Peninsula, Costa Rica

Ashley Cooper / Traditional kitchen stove in a peasant farmers house in northern China. March 2009. The main fuel for the stove is dried maize stalks which is renewable and has a zero carbon footprint. The stove is a...

Nick Upton / Monitor linked to an infra red camera in a Common swift (Apus apus) nestbox with an adult sitting beside two well developed chicks in a nest cup, Worlington, UK, Suffolk.

Nick Upton / Householder points to a monitor linked to an infra red camera in her attic focused on a group of perspex backed swift nestboxes, Cambridge, UK, July. Model released.

Nick Upton / Swift expert Dick Newell describing Common swift (Apus apus) behaviour seen by Pam Gatrell on a monitor linked to an infra red camera in her attic focused on a group of perspex backed swift nestboxes,...

SCOTLAND: The Big Picture / Red deer (Cervus elaphus) stags sparring during rutting season, February.

Nick Hawkins / Army ant (Eciton sp.) linked with others to make a bridge, Costa Rica. February 2015.

Wild Wonders of Europe / Muñoz / Griffon vulture (Gyps fulvus) two with linked legs in dispute, Campanarios de Azaba Biological Reserve, a rewilding Europe area, Salamanca, Castilla y Leon, Spain

Chadden Hunter / Husky dogs (Canis familiaris) linked to sledge, Northern Canada. Taken on location for BBC Frozen Planet series, 2009

Nature Production / Common Skimmer dragonflies {Sympetrum frequens} pair linked together for laying eggs ,

Mark Moffett / Army Ant (Ection sp) group linked together in bivouac, Peru