---
title: "What the sources say about the Lar Gibbon | AnimalTracks.wiki"
description: "38 claims from the Lar Gibbon profile, each beside the words of the source that backs it."
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# What the sources say about the Lar Gibbon (*Hylobates lar*)

> 38 claims from the Lar Gibbon profile, each beside the words of the source that backs it. A "..." marks a cut in a quote and [brackets] an insertion.

Profile: [Lar Gibbon](https://animaltracks.wiki/animals/lar-gibbon/)

## Hylobates lar. Animal Diversity Web.

https://animaldiversity.org/accounts/Hylobates_lar/

| The page says | The source says |
| :--- | :--- |
| A rainforest singer whose pair duets average 11 minutes and carry up to a kilometre. | These calls average 11 minutes and can be heard up to one kilometer away (note: tagline) |
| Tropical rainforests of Southeast Asia | distributed throughout the tropical rainforests of Southeast Asia including Indonesia, Laos, Malaysia, Myanmar, and Thailand (note: stats.habitat) |
| up to 1,200 m | Their altitudinal range is limited to 1,200 meters. White-handed gibbons are a high canopy species (note: ADW writes 1,200 meters) |
| Mostly ripe fruit, plus leaves, flowers and insects | White-handed gibbons are largely frugivorous animals, eating ripe fruit from woody (note: stats.diet) |
| Leaves, flowers and insects round out the menu. | They also eat leafy plants, flowers, and insects (note: stats.diet and body) |
| Mated pairs sing duets that carry up to a kilometre | Normal duets are loud songs delivered by a mated pair (note: stats.superpower) |
| An average duet lasts 11 minutes and carries up to a kilometre through the forest. | These calls average 11 minutes and can be heard up to one kilometer away |
| Between sunrise and noon, a bonded pair of lar gibbons sings together, and the song peaks at mid-morning. | Duets occur between sunrise and noon, and peak at mid-morning. |
| The duet opens with an introductory call, a series of notes from both partners. Then comes the great call: the female starts it and the male answers. An interlude of male and female notes follows. | an introductory call, a great call, and an interlude sequence. The introductory call is a series of notes by the pair, followed by the great call which begins with the female to which the male answers back |
| Males also sing together at the edges of their home range to chase off intruders. | Males sing together at range edges to chase away intruders |
| Lar gibbons live high in the canopy of tropical rainforest across Southeast Asia, in Indonesia, Laos, Malaysia, Myanmar and Thailand. | White-handed gibbons are a high canopy species and are rarely found in the understory |
| They are gone from China. | Unfortunately, they are no longer found in China. |
| Their forelimbs, hands and feet are long, an adaptation for brachiation | Their elongated forelimbs, hands, and feet are adaptations for brachiation |
| It is their main way of getting around the treetops. | brachiation, which is their primary mode of travel through forest canopies |
| They have no tail. | Lar gibbons do not have tails. |
| Their hands and feet are white, a ring of short pale fur surrounds a bare face | The hairless face is surrounded by a ring of very short white or lightly colored fur; and the hands and feet are both white |
| the coat can be dark (grey to black to brown) or light (cream to light brown) | They wear either a dark coat, which may range from gray to black to brown, or a light coat of light cream color to light brown |
| An adult is 42 to 58 cm long and weighs 4.4 to 7.6 kg, with males the larger sex. | Males are 43.5 to 58.4 cm long and females are 42.0 to 58.0 cm long. Males weigh 5.0 to 7.6 kg and females weigh 4.4 to 6.8 kg (note: rounded range 42.0 to 58.4 cm per ADW Range length; ADW Sexual Dimorphism: male larger) |
| Females are mature at around 9 years | Females begin reproducing between 6 and 9 ears old, but are fully sexually mature at 9. |
| gestation lasts 7 months, and a mother has one baby about every 3.5 years | They give birth to only one offspring about every 3.5 years and gestation lasts 7 months |
| They are mostly monogamous, living in groups of 2 to 6 animals. | White-handed gibbons are mostly monogamous, living in groups of 2 to 6 members |
| Lar gibbons are mostly fruit eaters | White-handed gibbons are largely frugivorous animals, eating ripe fruit from woody |
| They taste fruit and accept or reject it by ripeness, then return to the same food sources through the peak season for the ripest pick. | Fruits are tasted and either accepted or rejected based on ripeness. The same food sources are returned to multiple times during peak season to eat the ripest fruit each time |
| Eagles, leopards, marbled cats and pythons are listed as potential predators, but no act of predation on a gibbon has been observed. | Potential predators of white-handed gibbons include eagles, leopards, marbled cats, and pythons, though no act of predation has been observed. |
| On average, lar gibbons spend fifteen and a half hours a day in their sleeping trees, from several hours before dusk until morning, and they go to them without calling or physical contact on the way, which suits animals trying to stay unnoticed by predators. | Fifteen and a half hours on average are spent in 'sleeping trees', from several hours before dusk until the following morning. This behavior reflects their adaptations to minimize predation risk. Vocal and physical interactions when retreating to sleeping trees are absent so as to avoid predator detection. |
| blamed that status in part on the illegal pet trade in Thailand, in which gibbons are hunted and captured, and called deforestation a growing threat. | Their status is in part due to the flourishing illegal pet trade in Thailand, in which they are hunted, captured, traded, and exploited. The deforestation of habitat is also a threat and is becoming more of a problem. |
| A pair's duet can be heard up to a kilometre away, and it runs about 11 minutes on average. | These calls average 11 minutes and can be heard up to one kilometer away |
| Males weigh 5.0 to 7.6 kg and females 4.4 to 6.8 kg. Males measure 43.5 to 58.4 cm long and females 42.0 to 58.0 cm. | Males are 43.5 to 58.4 cm long and females are 42.0 to 58.0 cm long. Males weigh 5.0 to 7.6 kg and females weigh 4.4 to 6.8 kg |
| They have no tail. | Lar gibbons do not have tails. |
| and they are choosy | are very selective feeders when it comes to fruit consumption |
| Animal Diversity Web's 2014 account | Beaman, M. 2014. "Hylobates lar" (On-line), Animal Diversity Web (note: date of the ADW account) |
| Lar gibbon pairs sing between sunrise and noon, peaking at mid-morning | Duets occur between sunrise and noon, and peak at mid-morning. (note: vibe.reason) |
| in the great call one partner starts and the other answers | followed by the great call which begins with the female to which the male answers back (note: vibe.reason) |

## AnAge entry for Hylobates lar. Human Ageing Genomic Resources, AnAge.

https://genomics.senescence.info/species/entry.php?species=Hylobates_lar

| The page says | The source says |
| :--- | :--- |
| The AnAge database lists 56 years as the maximum in captivity, an estimate for a wild-born female that died in a zoo. | Maximum longevity 56 years (captivity) Source John Gramieri, pers. comm. Sample size Large Data quality High Observations A female wild-born specimen acquired by San Antonio Zoo in 1954 died in 2008 at an estimated 56 years of age. |
| The record in AnAge is an estimated 56 years in captivity. It belongs to a wild-born female acquired by San Antonio Zoo in 1954, who died in 2008. | Maximum longevity 56 years (captivity) Source John Gramieri, pers. comm. Sample size Large Data quality High Observations A female wild-born specimen acquired by San Antonio Zoo in 1954 died in 2008 at an estimated 56 years of age. |
| Her male companion, acquired the same year, reached an estimated 51. | Her male companion, also acquired in 1954, passed away in 2005 at the estimated age of 51 years |

## Brockelman & Geissmann (2020). Hylobates lar. The IUCN Red List of Threatened Species 2020: e.T10548A17967253.

https://doi.org/10.2305/iucn.uk.2020-2.rlts.t10548a17967253.en

| The page says | The source says |
| :--- | :--- |
| Endangered | IUCN Red List category: Endangered (EN). (note: conservationStatus and body; category read through GBIF's copy of the Red List) |

## Brockelman & Schilling (1984). Inheritance of stereotyped gibbon calls. Nature.

https://doi.org/10.1038/312634a0

| The page says | The source says |
| :--- | :--- |
| the females' great-calls showed no sign of being learned from their parents and seemed to be under strong genetic control | in female hybrids, the patterns of the loud and stereotyped 'great-calls' show no evidence of learning from parents, and appear to be under strong genetic control (note: hybrids of white-handed and pileated gibbons) |