Cyril Ruoso / Sumatran orangutan (Pongo abelii) female holding hands with baby whilst hanging from liana. Gunung Leuser National Park, Sumatra, Indonesia.

Anup Shah / Sumatran orangutan (Pongo abelii) female 'Juni' aged 12 years swinging from a liana. Gunung Leuser National Park, Sumatra, Indonesia. Rehabilitated and released (or descended from those which were rel...

Tim Laman / Small liana / vine in Sumatran rainforest, Batang Toru Forest, Sumatran Orangutan Conservation Project, North Sumatran Province, Indonesia.

Heather Angel / Shrubs, trees and lianas in tropical rainforest. Xishuangbanna,Yunnan Province, China.

Staffan Widstrand / Wild Wonders of China / Tangle of roots and lianas, Tangjiahe National Nature Reserve, Qingchuan County, Sichuan province, China

Staffan Widstrand / Wild Wonders of China / Lianas sp. growing around a tree , Tangjiahe National Nature Reserve,Qingchuan County, Sichuan province, China

Staffan Widstrand / Spiral vine / liana, Lowland rainforest, near Kap Araide, Kumawa Peninsula, Western Papua, Indonesian New Guinea

Enrique Lopez-Tapia / Sumatran orangutan (Pongo abelii) female moving between lianas, Gunung Leuser National Park, UNESCO World Heritage site, November.

Eric Baccega / Mountain gorilla(Gorilla beringei beringei) juvenile swinging on liana and smiling in forest. Virunga National Park, Democratic Republic of Congo, Africa

Cyril Ruoso / Winged Liana seed known as a 'samara', in tropical forest, Bateke Plateau, Gabon.

Cyril Ruoso / Tropical rainforest with lianas, Barro Colorado island, Gatun lake, Panama Canal, Panama.

Cyril Ruoso / Tropical rainforest with Lianas, Barro Colorado island, Gatun lake, Panama Canal, Panama.