# Javan gibbon vs Siamang: the differences

> How do the Javan gibbon (Hylobates moloch) and Siamang (Symphalangus syndactylus) differ? Classification, features, range, diet, size, IUCN status and legal protection, from cited sources.

Source: https://panduanhewan.org/en/species/differences/javan-gibbon-vs-siamang/ · Updated 1 October 2026 · English · Bahasa Indonesia: https://panduanhewan.org/id/spesies/perbedaan/owa-jawa-dan-siamang/
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The Javan gibbon (Hylobates moloch) and the siamang (Symphalangus syndactylus) share the family Hylobatidae but belong to different genera: Hylobates and Symphalangus. Range in Indonesia — the Javan gibbon: Forests on Java; the siamang: Sumatra.

| Aspect | [Javan gibbon](https://panduanhewan.org/en/species/javan-gibbon/) | [Siamang](https://panduanhewan.org/en/species/siamang/) |
|---|---|---|
| Scientific name | Hylobates moloch | Symphalangus syndactylus |
| Indonesian name | Owa Jawa | Siamang |
| Class | Mammalia | Mammalia |
| Order | Primates | Primates |
| Family | Hylobatidae | Hylobatidae |
| Range in Indonesia | Forests on Java | Sumatra |
| Endemic to Indonesia | Yes | No |
| Key features | — | Inflatable throat sac |
| Size | — | Body size: About 10 kg; 74–89 cm tall |
| Diet | Fruit, leaves, and flowers | Fruit and young leaves |
| Diet type | herbivore (plant-eater) | herbivore (plant-eater) |
| Reproduction | giving birth to live young (viviparous) | giving birth to live young (viviparous) |
| IUCN status | Endangered | Endangered |
| Legal protection | Protected (Regulation P.106/2018) | Protected (Regulation P.106/2018) |

Every cell comes from the sourced data on each animal’s page.