… Although known to science for 300 years the orang-utan Pongo pygmaeus has remained
the least understood of the apes. Tales of early travellers (Schlegal & Miiller 1839--44; …

… A natural population of orangutans (Pongo pygmaeus wurmbii) was studied in the peat-swamp
forest at Tuanan (Mawas, Kalimantan Tengah, Indonesia), located at 2 ◦ 09 06 S, and …

… orangutans (Pongo pygmaeus abelii), with a focus on intentional signals in two groups of
captive orangutans. … According to the daily routine, the orangutans had the possibility to retreat …

… orangutan (Pongo pygmaeus) exists in the wild only on the islands of Borneo and Sumatra.
Orangutans are … , the Bornean (Pongo pygmaeus pygmaeus) and the Sumatran (Pongo …

… Orangutans should then show hierarchical intelligence when obtaining difficult … orangutans'
techniques for processing difficult foods concurs. Intellectual qualities distinct to orangutans …

… I suggest that regardless of precisely how the orangutan came to possess its present
postcranial morphology (supra), the morphology provides remarkable suspensory capacities that …

… Background Orang-utans exist today in small isolated populations on the islands of
Borneo (subspecies Pongo pygmaeus pygmaeus) and Sumatra (subspecies P. p. abelii). …

… Most researchers recognize two separate subspecies, Pongo pygmaeus abelii in Sumatra
and Pp pygmaeus in Borneo.Relative to other primates, they have a variety of unusual …

… Most of the older orangutans no longer had close contact with humans but visited the
provisioning sites regularly. Most of these orang-utans had suffered the trauma of being separated …

… We report an observational field study that aimed to identify innovative processes in rehabilitant
orangutans’ (Pongo pygmaeus) water innovations on Kaja Island, Central Kalimantan, …