Klaus Echle / Red Fox (Vulpes vulpes) walking along a fallen trunk, silhouetted in misty forest. Black Forest, Germany, November.

Nick Garbutt / Sumatran pit viper (Trimeresurus sumatranus) juvenile on tree trunk, in tropical rainforest. Danum Valley, Sabah, Borneo, Malaysia.

Clay Bolt / Wallace's giant bee (Megachile pluto) and nest on tree trunk. North Moluccas, Indonesia.T his is the only photo that is known to exist of this species (the world's largest bee) in the wild, in situ, a...

Marie Lochman / Karri (Eucalyptus diversicolor), third tallest tree in the world, Western Australian endemic plant, D'Entrecasteaux National Park, April 2017

Marie Lochman / Wandoo (Eucalyptus wandoo), Western Australian endemic plant, Darling Range, December 2014

Marie Lochman / Wandoo (Eucalyptus wandoo), Western Australian endemic plant, Mt. Yetar - Darling Range, December 2014

Marie Lochman / Salmon Gum (Eucalyptus salmonophloia), Western Australian endemic plant, Dunn Rock Nature Reserve, March 2015

Marie Lochman / Red tingle tree (Eucalyptus jacksonii), Western Australian endemic plant, Walpole-Nornalup National Park, Western Australia.

Suzi Eszterhas / Cotton-top tamarin (Saguinus oedipus), three climbing tree. Northern Colombia.

Markus Varesvuo / Black woodpecker (Dryocopus martius) male perched on tree trunk, trees covered in hoar frost. Kuusamo, Northern Ostrobothnia, Finland. February. Commended in the Birds in the Environment Category of t...

Markus Varesvuo / Blue tit (Parus caeruleus) perched on tree trunk, looking at camera with wing stretched. Haukipudas, Finland. January.

Lorraine Bennery / White-fronted brown lemur (Eulemur albifrons) climbing tree, looking at camera. Rainforests of the Atsinanana, Marojejy National Park, Madagascar.