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

Nick Upton / Dark green fritillary (Argynnis aglaja) nectaring on a Greater knapweed flower (Centaurea scabiosa) in a chalk grassland meadow, joined by a Meadow brown butterfly (Maniola jurtina), Wiltshire, Englan...

David Fleetham / Two Green Sea Turtles (Chelonia mydas) on a reef. Hawaii. Two images were digitally joined to make this panorama.

Nick Upton / Slow motion clip of a Dark green fritillary butterfly (Argynnis aglaja) nectaring on a Greater knapweed (Centaurea scabiosa) flower and being joined by a female Thick-legged flower beetle (Oedemera no...

John Waters / Female Grayling (Thymallus thymallus) swimming and feeding, moving a rock, joined by second female, River Kennet, Berkshire, England, UK. March.

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

Matthew Maran / Beech tree (Fagus sylvatica) and Oak tree (Quercus robur) growing so close together the trunks have joined, a phenomenon known as inoscualtion, Hampstead Heath, London, England, UK. November.

John Waters / Panorama of Burrow Mump and its ruined hilltop church near Burrowbridge. In the foreground a swollen River Parrett on the right is joined by the River Tone on the left. Somerset Levels, Somerset, UK,...

John Waters / Burrow Mump and its ruined hilltop church near Burrowbridge. In the foreground a swollen River Parrett on the right is joined by the River Tone on the left. Somerset Levels, Somerset, UK. January 2014...

Laurent Geslin / Simien jackals post-coitus, joined together {Canis simensis} Bale Mts NP, Ethiopia, 2004

Jabruson / Watched by a large group of children, a Putty nosed monkey (Cercopithecus nictitans nictitans) young female tied to a heavy old vehicle engine part is joined by a young captive free-ranging male Grey-...

Jabruson / Under the watchful direction of her owner, a Putty nosed monkey (Cercopithecus nictitans nictitans) young female tied to a heavy old vehicle engine part is joined by a young captive free-ranging male...