The Sumatran orangutan (Pongo abelii) is found only on the island of Sumatra, in Indonesia. Males grow to about 1.4m / 90kg and females average 90cm / 45kg. Compared with the Bornean orangutan, the Sumatran orangutan is mainly arboreal and tends to be more frugivorous and insectivorous. The species has been assessed as critically endangered on the IUCN Red List since 2000.
Zoos are increasingly recognising their role both in conservation and in education, becoming more naturalistic in environment, focusing more on species preservation and scientific research and less on entertainment. The pressure of vanishing and unprotected habitats worldwide forces the consideration of captive management, as for many species - zoos are likely to be the last stop on the way to extinction.