Andrew Walmsley / Sumatran orangutan (Pongo abelii) mother and baby Bukit Lawang, North Sumatra.

Jabruson Motion / Conservation workers carrying a sedated Sumatran orangutan (Pongo abelii) towards vehicles and a transport box, part of a relocation programme, Sei Serdang, Prima, Batang Serangan, Langkat, North Suma...

Jabruson Motion / Juvenile male Sumatran orangutan (Pongo abelii) 'Januar' taking banana from keeper, Bukit Lawang Orangutan Sanctuary, Gunung Leuser National Park, North Sumatra, Indonesia.

Jabruson Motion / Female Sumatran orangutan (Pongo abelii) 'Juni' feeding, drinking milk from a cup, with male baby 'Januar' aged 18 months, Bukit Lawang Orangutan Sanctuary, Gunung Leuser National Park, North Sumatra,...

Jabruson Motion / Female Sumatran orangutan (Pongo abelii) 'Wati' feeding on ants, with a juvenile wanting to join in, Bukit Lawang Orangutan Sanctuary, Gunung Leuser National Park, North Sumatra, Indonesia.

Jabruson Motion / Female Sumatran orangutan (Pongo abelii) 'Wati' feeding on ants with a juvenile, Bukit Lawang Orangutan Sanctuary, Gunung Leuser National Park, North Sumatra, Indonesia.

Jabruson Motion / Female Sumatran orangutan (Pongo abelii) 'Wati' feeding on ants, Bukit Lawang Orangutan Sanctuary, Gunung Leuser National Park, North Sumatra, Indonesia.

Jabruson Motion / Female Sumatran orangutan (Pongo abelii) 'Wati' feeding on ants, Bukit Lawang Orangutan Sanctuary, Gunung Leuser National Park, North Sumatra, Indonesia.

Jabruson Motion / Female Sumatran orangutan (Pongo abelii) 'Wati' moving through canopy, Bukit Lawang Orangutan Sanctuary, Gunung Leuser National Park, North Sumatra, Indonesia.

Cyril Ruoso / Sumatran orangutan (Pongo abelii) baby reaching up to mother's hand, Gunung Leuser National Park, Sumatra, Indonesia.

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

Jabruson / 'Kith' / 'Kin' Sumatran orangutan (Pongo abelii) captive animal in walled enclosure, Perth Zoo, Western Australia, August 2001.

Anup Shah / Sumatran orangutan (Pongo abelii) female 'Jaki' aged 16 years with baby daughter 'Jodi' aged 2-3 years - portrait. Gunung Leuser National Park, Sumatra, Indonesia. Rehabilitated and released (or desce...

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...

Anup Shah / Sumatran orangutan (Pongo abelii) mature male 'Halik' aged 26 years sitting in a forest clearing watched from a tree by female 'Juni' aged 12 years. Gunung Leuser National Park, Sumatra, Indonesia. Re...

Fiona Rogers / Sumatran orangutan (Pongo abelii) female 'Sandra' aged 22 years portrait. Gunung Leuser National Park, Sumatra, Indonesia. Apr 2012. Rehabilitated and released (or descended from those which were rele...

Fiona Rogers / Sumatran orangutan (Pongo abelii) female 'Pesec' aged 28 years portrait. Gunung Leuser National Park, Sumatra, Indonesia. Apr 2012. Rehabilitated and released (or descended from those which were relea...

Fiona Rogers / Sumatran orangutan (Pongo abelii) mature male 'Halik' aged 26 years lying down - portrait. Gunung Leuser National Park, Sumatra, Indonesia. Apr 2012. Rehabilitated and released (or descended from thos...

Suzi Eszterhas / Sumatran Orangutan (Pongo abelii) female grabbing the hand of her offspring, aged 1.5 years, North Sumatra, Indonesia. Critically Endangered

Suzi Eszterhas / Sumatran Orangutan (Pongo abelii) mother and playful baby aged 9 months, North Sumatra, Indonesia. Critically Endangered *Digitally removed highlight in background

Suzi Eszterhas / Long tailed macaque (Macaca fascicularis) trying to take banana from Sumatran Orangutan (Pongo abelii and young baby, North Sumatra, Indonesia. Critically Endangered

Anup Shah / Sumatran orang utan mother with baby up a tree above forest stream (Pongo pygmaeus abelii) Gunung Leuser NP, Sumatra, Indonesia

Anup Shah / Sumatran Orang utan female with young resting in nest made in tree (Pongo pygmaeus abelii) Gunung Leuser NP, Sumatra, Indonesia

Rod Williams / Sumatran orang utan {Pongo pygmaeus abelii} male portrait. Captive. Indonesia.

Anup Shah / Sumatran Orang utan 'kissing' young {Pongo pygmaeus abelii} Gunung Leuser NP, Sumatra, Indonesia

Anup Shah / Sumatran Orang utan baby hanging upsidedown in tree {Pongo pygmaeus abelii} Gunung Leuser NP, Sumatra, Indonesia

Anup Shah / Sumatran Orang utan baby swinging in tree {Pongo pygmaeus abelii} Gunung Leuser NP, Sumatra, Indonesia

Anup Shah / Sumatran Orang utan baby clinging to mother portrait {Pongo pygmaeus abelii} Gunung Leuser NP, Sumatra, Indonesia

Anup Shah / Sumatran Orang utan 'kissing' young {Pongo pygmaeus abelii} Gunung Leuser NP, Sumatra, Indonesia

Anup Shah / Sumatran orang utan baby hanging from adult {Pongo pygmaeus abelii} Indonesia, Gunung Leuser NP, Sumatra

Anup Shah / Sumatran orang utan baby {Pongo pygmaeus abelii} Gunung Leuser NP Sumatra, Indonesia

Anup Shah / Abstract Sumatran orang utan swinging through forest with infant {Pongo pygmaeus abelii} Gunung Leuser NP CR Indonesia

Ingo Arndt / Sumatran orang utan feeding on termites {Pongo pygmaeus abelii} Sumatra, Indonesia

Anup Shah / Orang utan high in tree of rainforest canopy, (Pongo abelii) Leuser NP, Indonesia

Anup Shah / Orang utan swinging through rainforest tree canopy, (Pongo abelii) Leuser NP, Indonesia

Ingo Arndt / Orang utan hand holding branch close-up {Pongo pygmaeus abelii} Sumatra, Indonesia

Anup Shah / Orang utan portrait {Pongo abelii)

Anup Shah / Baby Orang utan climbing liana {Pongo abelii} Gunang Leuser NP, Indonesia

Anup Shah / Orang utan sheltering under leaf {Pongo abelii} Gunang Leuser NP, Indonesia

Anup Shah / Orang utan and young catching rain with open mouth {Pongo abelii} Gunang Leuser NP, Indonesia

Anup Shah / Orang utan baby, (Pongo abelii) Gunung Leuser NP, Indonesia

Anup Shah / Orang utan in forest, (Pongo abelii) Gunung Leuser NP, Indonesia

Anup Shah / Orang utan with baby, (Pongo abelii) Gunung Leuser NP, Indonesia

Anup Shah / Sumatran Orang utan male in canopy calling out (Pongo abelii) Gunung Leuser NP, Sumatra, Indonesia

Anup Shah / Orang utan silhouetted in trees, (Pongo abelii) Gunung Leuser NP, Indonesia

Anup Shah / Orang utan playing with stick, (Pongo abelii) Gunung Leuser NP, Indonesia

Anup Shah / Orang utan playing with water in stream, (Pongo abelii) Gunung Leuser NP Indonesia

Anup Shah / Juvenile orang utan {Pongo abelii} Gunung Leuser NP Sumatra Indonesia