Sounds & Calls
One of the diagnostic vocalisations of this species is a complex series of low-high bi-phasic notes often given by males which ends with a brief phrase of lower-pitched bubbly notes. The female great call is also unique – a series of sweeping notes which rise, accelerate, then decelerate, rise again, and taper off. When duetting with the female great call, males contribute a rapid series of notes similar to the great call of female Mueller’s Bornean Gibbon (Hylobates muelleri) and frequently add one of the aforementioned bi-phasic series to complete the duet.
As a result of widespread deforestation and hunting throughout much of its range, Pileated Gibbon populations are decreasing and are now considered endangered.
Listen to Pileated Gibbon Sounds
The video below fetaures a male Pileated Gibbon singing in Khao Yai National Park, Thailand. This cut includes several examples of the distinctive low-high bi-phasic series with bubbly trailing notes.
Spectrogram showing male Pileated Gibbon (Hylobates pileatus) bi-phasic series of notes which ends with a brief phrase of lower-pitched bubbly notes.
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Primate sounds from South-east Asia:
- Orangutan, Bornean (Pongo pygmaeus)
- Gibbon, Agile (Hylobates agilis)
- Gibbon, Mueller's (Hylobates muelleri)
- Gibbon, Pileated (Hylobates pileatus)
- Gibbon, White-handed (Hylobates lar)
- Langur, Banded (Presbytis robinsoni)
- Langur, Dusky (Trachypithecus obscurus)
- Leaf Monkey, Red (Presbytis rubicunda)
- Macaque, Long-tailed (Macaca fascicularis)
- Siamang (Symphalangus syndactylus)