Paul Bertner / Caterpillar with aposematic coloration, Gunung Leuser National Park, Sumatra, Indonesia

Paul Bertner / Assassin Bug (Acanthaspis sp) being attacked by ants, Gunung Leuser National Park, 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.

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...

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) twenty-four year old female, named Ratna, playing with her female baby, named Global, Gunung Leuser National Park, Sumatra, Indonesia

Fiona Rogers / Sumatran Orangutan (Pongo abelii) twenty-six year old male, named Halik, biting lip, Gunung Leuser National Park, Sumatra, Indonesia