They are all small to medium in size. Their altitudinal range is limited to 1,200 meters. Males weigh 5.0 to 7.6 kg and females weigh 4.4 to 6.8 kg (Gron, 2010). Weaning lasts about 20 months. Lar gibbons have the greatest north-south range of any of the gibbon species. They are also detectable from their movement through trees or by plain sight, but these are much less common (Savini, Boesch, and Reichard, 2009). Family: Hylobatidae. Referring to a mating system in which a female mates with several males during one breeding season (compare polygynous). rainforests, both temperate and tropical, are dominated by trees often forming a closed canopy with little light reaching the ground. Their four fingers form a "hook" which gives them a solid grip on branches. Their al­ti­tu­di­nal range is lim­ited to 1,200 me­ters. Lar Gibbons live in home ranges in which they actively defend and using territorial calls. Superfamily: Hominoidea. (Gron, 2010; Savini, et al., 2009) Cambridge, UK: Cambridge University Press. In other words, India and southeast Asia. The Animal Diversity Web team is excited to announce ADW Pocket Guides! Barelli, C., M. Heistermann, C. Boesch, U. Reichard. Varying ecological quality influences the probability of polyandry in white-handed gibbons (Hylobates lar) in Thailand. Adult size is gained at 6 years but offspring remain in their natal group until around 9 years old, when they reach sexual maturity. 220px: Distribution in Southeast Asia Gibbons are apes in the family Hylobatidae (Template:Nowrap). found in the oriental region of the world. Sleeping sites, sleeping places, and presleep behavior of gibbons (Hylobates lar). Reichard, U. 15 of the subjects were wild animals, recorded at the Mo Singto—Klong E-Tau long-term research site at Khao Yai National Park, Thailand (101°22’E, 14°26’N), 130 km NE of Bangkok in June-July 2013 and July-August 2014, under a research permit issued by the National Research Council of … They have white hands, and a white ring around their faces.They mostly eat fruit, but also a large proportion of leaves, as well as insects and flowers. Grooming site preferences in wild white-handed gibbons (Hylobates lar). (Brockelman and Geissmann, 2008; Gray, 2012). (Brockelman and Geissmann, 2008), White-handed gibbons do not provide any significant, positive economic importance that can be noted. Their range historically extended from southwest China to Thailand and Burma south to the whole Malay Peninsula in primary and secondary tropical rain forests. The White-handed Gibbon (Hylobates lar) [also known as the Lar Gibbon] is a widespread species found in lowland and hill evergreen forests in Malaysia, Thailand, Myanmar, Laos, China as well as in northern Sumatra. By Stephen Luntz 17 Apr 2015, 22:44. and across multiple seasons (or other periods hospitable to reproduction). The forests in Southeast Asia are being logged and cleared for agriculture at a very rapid pace, reducing the area where forest inhabitants can live. 1997. Arms are very long, fingers are long and hook-like, and thumbs are t… Reichard, U., V. Sommer. Mammalian Biology, 69: 73-80. Accessed December 22, 2020 at https://animaldiversity.org/accounts/Hylobates_lar/. Habitat: Tropical evergreen to tropical dry forest. Allo-grooming probably serves more as a hygienic activity than a social function for this species (Reichard and Sommer, 1994). Females care for young extensively. White-handed gibbons are a high canopy species and are rarely found in the understory (Gron, 2010). at http://www.academia.edu/1525036/Conservation_Difficulties_for_Hylobates_lar_Effects_the_Illegal_Pet_Trade_has_on_White-handed_Gibbons_Behavioral_Health_and_Successful_Rehabilitation. It turns out lar gibbons have a complex, context-specific language in their whispers, which until now has been overlooked due to their loud calls. Eat or be eaten: predator sensitive foraging among primates. Although this species is highly mobile, they do not gain safety during this stationary time period since they may fall asleep and not wake until a predator is upon them (Reichard, 1998) (Raemaekers and Raemaekers, 1985; Reichard and Sommer, 1994; Reichard, 1998; Savini, et al., 2009), Lar gibbons communicate using term songs, which are combinations of solos and/or duets performed by bonded pairs. 109–38. Gron, K. 2010. Gibbons use vocalization to communicate with others of their species. change in fur color), or age-related changes to be polymorphic. great apes. In some countries, Thailand in particular, the capture of juvenile gibbons to be sold as pet trade is widespread. White-handed gibbons are currently listed as an endangered species on the IUCN Red List. (On-line). They are found in Indonesia, Laos, Malaysia, Myanmar and Thailand. In recent decades, especially, the continental range has been reduced and fragmented. sexual dimorphism), seasonal changes (e.g. compared to 900 hairs per sq. Offspring aren't usually involved, but female offspring may sometimes perform a great call with her mother. Food sources are also shared in overlapping territory areas (Reichard, 1998). It is also present in the northwest portion of the island of Sumatra. cm. having body symmetry such that the animal can be divided in one plane into two mirror-image halves. 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