Conservation specialists consider these animals as among the most endangered of gibbon species. Ecology of the hoolock gibbon (Hylobates hoolock), a lesser ape in the tropical forests of north-eastern India. 1984, Chivers 2001). (2006) suggested that populations that are not viable (e.g., populations with two individuals (Rema Kalenga) may benefit from translocation to protected areas with better habitat (such as Satchari). 2005). Facts Summary: The Hoolock Gibbon (Bunopithecus hoolock) is a species of concern belonging in the species group "mammals" and found in the following area(s): China, India, Southeast Asia. 2 subspecies: Western Hoolock Gibbon (Bunopithecus hoolock hoolock), Eastern Hoolock Gibbon (Bunopithecus hoolock leuconedys), This article is only an excerpt. Gibbons (hylobatidae) are small apes distributed in south and southeast Asia (Preuschoft et al. A new subspecies of the western hoolock gibbon has been described recently from northeastern India, which has been named the Mishmi Hills hoolock gibbon, Hoolock hoolock mishmiensis. However, although the plans are well thought out, implementation has not occurred at the desired level thereby preventing improvement in the population status of primates in these areas (Kabir & Muzaffar 2002, Islam et al. Hoolock gibbon has been categorized as endangered in the IUCN-red list. Indian records of the species likely to actually represent the Western Hoolock The species has experienced a drastic population decline in the last 30 to […] The Western Hoolock gibbon is an endangered lesser ape found in Asia. We are also grateful to Anthony Di Fiore and three anonymous reviewers for critically reviewing a previous version of the manuscript and providing suggestions that have significantly improved this manuscript. The western hoolock is listed as Endangered in the IUCN Redlist. Learn more. The hoolock gibbons are three primate species of genus Hoolock in the gibbon family, Hylobatidae, native to eastern Bangladesh, Northeast India … Tectona grandis (teak) was the most dominant of the tree species in Kaptai. La specie è inserita nella Appendice I della Convention on International Trade of Endangered Species . (CNN) A newly-discovered species of gibbon should be named in honor of Luke Skywalker, say the Star Wars-loving scientists who found it. Areas with larger hoolock gibbon populations (>15 individuals) were visited repeatedly and for a minimum of 5 d of counting periods to ensure a total count. Species threat status is taken from the IUCN Red List of endangered species, available at www.iucnredlist.org At the time of the survey, one USD was roughly equivalent to 1,000 kyat. Their populations in southern China and Myanmar have not been surveyed in recent years and population estimates from the eighties suggested no more than 200 individuals lived in these areas (MacKinnon & MacKinnon 1987, Mootnick et al. Habitat characteristics in Lawachara and Kaptai.— A total of 25 species was identified in Lawachara in the 86 point samples (with 344 trees), compared to the 32 species in the 206 point samples (with 824 trees) in Kaptai. 53 new species should be categorized as Endangered under IUCN criteria. This study determined that one such factor is most likely an important cause of population declines of hoolock gibbons in Bangladesh. We also analyzed the existing habitat characteristics in two of the largest hoolock gibbon populations in Bangladesh: Lawachara (42 individuals) and Kaptai (84 individuals). The song includes an introductory sequence, an organising sequence, and a great call sequence, with the male also contributing to the latter (unlike in some other gibbon species). 81/Ka, Road # 11, Baridhara, Dhaka 1212, Bangladesh, Corresponding author; Current address: Department of Biology, Memorial University of Newfoundland, St. John's, Newfoundland, Canada A1B 3X9; e‐mail: v35sbm@mun.ca, Current address: Wildlife Trust of Bangladesh, 69/1 New Circular Road, Malibagh, Dhaka, Bangladesh, Department of Zoology, University of Dhaka, Dhaka 1000, Bangladesh, Department of Zoology, Jahangirnagar University, Savaar, Dhaka, Bangladesh. This fascinating primate species is also found in the southern ranges of the Khasi Hills (community forests near Mawsynram) and Jaintia Hills. Groves 2005). The alteration of habitat for agriculture is widespread in Bangladesh and constitutes one of the most difficult challenges in wildlife conservation. Currently, hoolocks are categorized by the IUCN World Conservation Union in Bangladesh as critically endangered (IUCN 2000) and globally as endangered (IUCN 2006). In India they only occur in the north eastern states. This variable, although taken from the Forest Department's database, is unambiguous (and therefore useful) since it is clearly defined. Working off-campus? These maps divide each site into: (i) natural forests; (ii) plantations; (iii) agricultural lands; and (iv) other uses (combined use of forest village, grazing land, etc.). 2006) and in each site, forest paths or streams were walked slowly from dawn to 1600 h by two to four surveyors experienced in detecting hoolock gibbons. Each region has its distinct tree composition and forest canopy characteristics. We thank the US Fish and Wildlife Service for funding this project through its Great Ape Conservation Program. Habitat suitability of the Asiatic elephant in the trans-boundary Patharia Hills Reserve Forest, northeast India. (2004) have all speculated that closed‐canopy structure and diversity of fruiting trees are perhaps the most important determinants of hoolock gibbon population size in the sites where they are still present. Areas such as Patharia, Adampur, and Cox's Bazar (North), by contrast, have undergone drastic reductions in the “natural forests” leading to corresponding reductions in their hoolock gibbon populations. Groves 2005). A total of 35 sites were surveyed (Islam et al. Habitat characterization of western hoolock gibbons Hoolock hoolock by examining home range microhabitat use. Islam et al. Among the 13 gibbon species, hoolock gibbons Hoolock hoolock Harlan are perhaps under the greatest threat throughout their geographic range (Haimoff et al. Population and habitat viability assessments suggest that these and some other sites could be managed to maintain hoolock gibbon numbers at viable levels (Molur et al. Hoolock gibbons are distributed in various northeastern states in India, with a current total population of more than 2600 individuals (Molur et al. Known as hoolock gibbons, they are one of 19 species of gibbon that spread from East India and into Southeast Asia and China. The Western Hoolock gibbon is an endangered lesser ape found in Asia. Ten sites were identified from the northeastern region and 25 sites from the southeastern region (Table 1). In addition, we collected baseline data on the floristic composition and structure of two areas that are known to have relatively large hoolock populations. An adult female Skywalker Hoolock Gibbon (Hoolock tianxing). Unfortunately this charismatic species is facing habitat loss and hunting across its range. We demonstrate that a key habitat feature associated with the survival of hoolock gibbons is edible plant species richness. The Asian elephant (Elephas maximus) and Hoolock gibbon (Hoolock hoolock) are two globally endan-gered wildlife species limited to only tropical Asian forests. We are grateful to the Forest Department of the Government of Bangladesh for access and accommodation at many of the study sites. Gaoligong, endangered 57 species The category referred to as “plantations” also suffers from similar problems in terminology. [8] . 2005). The link between edible plant species richness was previously suspected, but to the best of our knowledge, has never been analyzed quantitatively in relation to hoolock gibbon numbers. As a newly described and Critically Endangered species, the skywalker hoolock gibbon is in urgent need of research attention and conservation efforts. Similarly, this study also provides the first quantitative link between agricultural land area and hoolock gibbon numbers across the study sites. Additionally, Islam et al. Apr 29, 2020 - The only tribe of apes inhabiting the country is the Hoolock Gibbons, found in the North-east forests. It might possibly occur in China (extreme southeastern Tibet). The genus of hoolock gibbons comprises two previously described living species, the western (Hoolock hoolock) and eastern hoolock (H. leuconedys) gibbons, geographically isolated by the Chindwin River. We estimate that by this procedure, we sampled 40 to 100 percent of the area within each site. Search for an endangered species profile. Feeroz (2001), Ahsan (2001), and Islam et al. The endangered forests of Bangladesh: why the process of implementation of the Convention on Biological Diversity is not working, https://doi.org/10.1111/j.1744-7429.2007.00298.x, https://www.cia.gov/cia/publications/factbook/geos/bg.html, *Indicates species that provide food for hoolock gibbons. Range Description. Plantations may refer to both monocultures as well as floristically diverse secondary forests (as is seen in Lawachara National Park). In Bangladesh both species are critically endangered and distributed mainly in the northeast and southeast hilly regions bordering neighboring India and Myanmar. Florian Magne, the huro programme founder, said today that Noree was born to Dawn at the centre near Tura, the district headquarters of West Garo Hills, on Monday. The Indian Wildlife (Protection) Act, 1972 put them in the list of Schedule-I species. Habitat characteristics in Lawachara and Kaptai.— Quantitative information on the habitat characteristics of hoolock gibbons is very limited (e.g., Ahsan 2001, Feeroz 2001). Hoolock Gibbon by Dr Raju Kasambe 03.JPG 768 × 791; 103 KB Hoolock Gibbon DSCN1410 01.jpg 4,608 × 3,456; 4.29 MB Hoolock Gibbon DSCN1410 02.jpg 4,608 × 3,456; 6.62 MB The population of the Skywalker hoolock gibbon is unknown, but it's believed to be very low. A further new species, Hoolock tianxing, with an estimated population of about 200 in China, was discovered in southwest China in 2017. In each study site, we recorded the total species richness of food‐trees present, based on the total list of species present in the Forest Department database and corroborated on the ground by field workers. and you may need to create a new Wiley Online Library account. We studied habitat characteristics of hoolock gibbons in Bangladesh to examine the variables that are important in determining hoolock gibbon numbers. Local people were used to help track the whereabouts of hoolock gibbons in each site. Also called White-browed Gibbon, fomerly Hylobates hoolock. Leaves or flowers of teak are not eaten although hoolock gibbons occasionally venture into teak stands, to feed on the teak skeletonizer moth larvae (Hyblea purea) occurring on the bark. Bangladesh, India, Myanmar — The population of this south Asian gibbon has declined by over 90% since the early 1970s when they totalled over 100,000. 2006), indicating that the species is tenaciously holding on in limited patches of a suitable habitat. The full text of this article hosted at iucr.org is unavailable due to technical difficulties. The hoolock gibbons, also known as hoolocks, one of the most important attractions of north east india’s wildlife, hoolock gibbons are two primate species from the family of the gibbons. Lawachara and Kaptai are the two sites in Bangladesh that currently harbor the largest hoolock gibbon populations (Islam et al. The relative density, relative cover, and relative frequency values varied between species and between Lawachara and Kaptai (Table 2). This species is found in eastern Bangladesh, northeastern India (Arunachal Pradesh, Assam, Manipur, Meghalaya, Mizoram, Nagaland, and Tripura), and northwestern Myanmar (west of the Chindwin River). The Asian elephant (Elephas maximus) and Hoolock gibbon (Hoolock hoolock) are two globally endan-gered wildlife species limited to only tropical Asian forests. Stops were made every 10 min to listen for calling hoolock gibbons or to scan the canopy for hoolock gibbons. Would you like to receive a notice and link when the Tree assemblages and diversity patterns in Tropical Juri Forest, Bangladesh. It is home to many rare and endangered species, including the Western Hoolock Gibbon. ... Western Hoolock gibbons, also known as white-browed gibbons, are the only apes that live in the Indian sub-continent. All known populations have undergone declines primarily due to habitat destruction or alteration. These problems in categorization are likely reasons for the absence of a relationship between plantations, natural forests, and hoolock numbers in our analyses. The censuses were conducted from 2003 to 2005 (detailed in Islam et al. ( Harlan, 1834) Western hoolock gibbon range. The dbh of trees in Lawachara was also significantly lower than trees in Kaptai (df = 1167, F= 7.67, P= 0.006). We thank the Departments of Zoology, Jahangirnagar University and the University of Dhaka; and the School of Environmental Science and Management of Independent University, Bangladesh for permitting and facilitating research activities at these different study sites. A further new species, Hoolock tianxing, with an estimated population of about 200 in China, was discovered in southwest China in 2017. In Arunachal Pradesh, villagers are helping the endangered hoolock gibbon swing from tree to tree In an Arunachal Pradesh village, locals are planting a corridor of gibbon-friendly trees in a bid to conserve the arboreal species in their natural habitat. Additionally, villagers living around important habitats should be carefully incorporated into conservation plans to prevent further degradation of these habitats by conversion to agricultural land. 2008 August 13. Area (s) Where Listed As Endangered: The Hoolock Gibbon ( Bunopithecus hoolock) is a species of concern belonging in the species group "mammals" and found in … Several populations have become extinct during the last 15 yr (Feeroz 2001, Das et al. Our study suggests that areas such as Baralekha, Lathitila, Lawachara, Satchari, and Adampur in the northeast and Kaptai, Rampahar, and Bamu have large enough populations and conservation efforts may be directed toward managing these hoolock gibbon populations. More to come soon. 2004). Please check your email for instructions on resetting your password. Ahsan (1994, 2001) and Feeroz (2001) have stated the importance of a diversity of fruiting trees in hoolock gibbon survival. If it appears incomplete or if you wish to see article references, visit the rest of its contents, Eight Inexpensive Ways You Can Help Endangered Species. The efforts for conservation of hoolock gibbon has been funded by US Fish Wildlife Service (Great Ape Conservation Fund). Both Lawachara and Kaptai had a high diversity of tree species, although clearly, each area varied with respect to the composition of tree species (Table 2). Check out our For corroboration surveys, field workers walked along 5–25 km of existing trails with a local guide. The species is probably endangered. 2006). Hoolock gibbon has been categorized as endangered in the IUCN-red list. This is the first quantitative study illustrating the importance of these two variables with hoolock gibbon numbers. Higher edible plant species richness was directly related to hoolock gibbon numbers, while the area of agricultural land was inversely related. Mortality of primates due to roads and power lines in two forest patches in Bangladesh. Artocarpus, Tectona, and Dipterocarpus were the three most important genera in both sites, although Artocarpus was more important in Lawachara. 2006). Management and conservation of hoolock gibbons.— Hoolock gibbons have survived in Bangladesh in spite of acute deforestation pressure (Ahsan 2001, Feeroz 2001, Islam et al. Some sites are combined due to their close proximity. Quantitative information assessing the link between habitat variables and population size, however, is not available. We conducted a stepwise multiple regression using the number of hoolock gibbons as the response variable and the area of natural forest, area of plantations, area of agricultural land, and edible plant species richness as explanatory variables. The species is confined to 29 fragmented forested areas in western and central Java. Received 11 April 2006; revision accepted 4 October 2006. Recent molecular evidence documented that the distance among gibbon subgenera was as large or larger than the distance between chimpanzees (Pan) and humans (Homo) (Roos & Geissmann, 2001). The hoolock gibbon is an umbrella species living in the semi‐evergreen deciduous forests of Bangladesh and their survival through management will also benefit other species that are components of closed‐canopy forests (Kabir & Muzaffar 2002). The northeastern and southeastern regions of Bangladesh both consist of semi‐deciduous moist evergreen forest patches with a wide variety of tree species (Rashid 1991, Ahsan 2001). Based on the results of these two studies, we offer suggestions to prioritize conservation and management action to help preserve hoolock gibbons in Bangladesh. 2006; Fig. games and coloring pages! Gron KJ. The species is probably endangered. The Western Hoolock Gibbon, the only wild ape found in India and also among the most endangered primates in the world, has found a safe haven thanks to the people of Meghalaya. Habitat quality across sites.— Maps of each study site were collected from the digitized map database available in the Forest Department, Ministry of Environment and Forest. The use of natural forest categorized by the Forest Department, therefore, does not provide any clear information on the habitat of hoolock gibbons, other than the fact that whatever habitat available to them had declined significantly over the years. "Populations of western hoolock gibbons have declined by almost 90% over the last 30 years, and it is now considered to be one of the most endangered 25 primate species in the world. Endangered or Critically Endangered Species include: the Endangered Western hoolock gibbon (Hoolock hoolock), the Endangered Asian elephant (Elephas maximus), and the Critically Endangered Chinese pangolin (Manis pentadactyla). The western hoolock gibbon (Hoolock hoolock) is a globally threatened species, and in Bangladesh it is critically endangered. The species’ populations have been declining due to habitat destruction of various forms and hunting for meat. Number of times cited according to CrossRef: Evolution, Ecology and Conservation of Lorises and Pottos. 2004). 1). Local names of plant species of significance to hoolocks were recorded when encountered and cross‐checked with field guides and other resources (Islam & Feeroz 1992, Islam et al. 56 Keywords: New species, Hoolock tianxing, gibbon, Mt. This does not mean that a relationship does not exist between natural forests and plantations and hoolock gibbon numbers. Improvement of habitat should involve carefully planned plantations of mixed native species providing food and habitat for hoolock gibbons. All variables were log transformed to normalize residuals (Sokal & Rohlf 1995). The principal cause of population decline is presumed to be habitat destruction (e.g., Gittins & Akonda 1982, Gittins 1984, Gittins & Tilson 1984, Chivers 2001, Islam et al. The eastern hoolock gibbon inhabits specific pockets of Arunachal Pradesh and Assam in India, and southern China and north-east Myanmar. The IUCN has classified the population of the western hoolock as endangered and that of the eastern hoolock as vulnerable. 2 subspecies: Western Hoolock Gibbon (Bunopithecus hoolock hoolock), Eastern Hoolock Gibbon (Bunopithecus hoolock leuconedys). Hoolock Gibbons, the only species of apes found in India, are threatened with extinction in the Ukhrul and Kamjong districts of Manipur HOOLOCK GIBBONS The hoolock gibbons are three primate species of genus Hoolock in the gibbon family, Hylobatidae, native to eastern Bangladesh, Northeast India, Myanmar and Southwest China . Ecology of the hoolock gibbon (Hylobates hoolock), a lesser ape in the tropical forests of north-eastern India. We examined the influence of area of natural forests, area … Each site also had an abundant variety of tree species utilized by hoolock gibbons for food. The eastern hoolock gibbon (Hoolock leuconedys) male can be differentiated from the western species (Hoolock hoolock) by its grizzled silver coloured chest; a silver genital tuft and the white brow streaks are widely separated in adult males and juveniles of both sexes instead of being Extricating the root cause of population declines in such a variety of factors that influence primate populations is often difficult. The hoolock gibbon, an endangered species, is a now rare sight in the forests of northeast India. Plant species of questionable identity, but of known importance to hoolocks (Ahsan 1994), were treated as unknown species and were identified to family level. Many tree species, important to hoolock gibbons, are common in both Lawachara and Kaptai, but are in various early stages of regeneration compared to more commercially important species. Conference proceedings, The swinging singing apes: Fighting for food and family in far‐east forests, Primates in northeast India: An overview of their distribution and conservation status, First five‐year management plan for Lawachara National Park, Forestry Sector Project (1997/8‐2003/4), Volume 2: Background material and support material, First five‐year management plan for Rema‐Kalenga Wildlife Sanctuary, Forestry Sector Project (1997/8‐2003/4), Volume 2: Background material and support material, The ecology and behavior of hoolock gibbons (, Species diversity and population density of non‐human primates in north‐east and south‐east of Bangladesh, Bangladesh environment: Facing the 21st Century, Field and laboratory methods in primatology, The distribution and status of Hoolock Gibbons in Bangladesh, The lesser apes: Evolutionary and behavioural biology, Notes on the ecology and behaviour of the Hoolock Gibbon, Conservation of gibbons in Yunnan Province, China, Red Book of threatened mammals of Bangladesh, The review of the present state of protected areas of Bangladesh, Statistical ecology: A primer on methods and computing, Conservation status of the primates of the Indo‐Chinese subregion, Conservation and captive management of hoolock gibbons in the Social Republic of the Union of Burma, Myth and reality in the rain forest: How conservation strategies are failing in West Africa. There are 4 Genus of gibbon There are 19 Species of gibbons within each of these 4 groups We currently house 5 of these species * Indicates species housed at the GCC. We presented the result of a systematic survey on the population size and distribution of the Endangered Gaoligong hoolock gibbon (Hoolock tianxing) in Houqiao Town, Tengchong City, Yunnan Province of China.A total of 15–18 individuals of H. tianxing in 5–6 gibbon groups and one solitary gibbon were recorded during the survey conducted in November 2019. Teak is one of the prime timber species, particularly in the southeastern regions of Bangladesh (Gain 2002, Kabir & Muzaffar 2002). western hoolock gibbons singing are monogamous and live in small family groups (2 - 5 individuals) with the adult male and female and their offspring. 1987). About 200 animals are thought to exist in China as well as an unknown number in Myanmar. … In fact, the areas that have undergone declines in population have also lost considerable natural forests as classified by the Forest Department. Genus . Shillong, Sept. 22: In a major boost to wildlife conservation, a western hoolock gibbon, a highly endangered species, was born at the Huro Programme Rehabilitation Centre in Meghalaya's West Garo Hills this week. Hemmed in by tea estates, the 20.98 sq km Hollongapar Gibbon Sanctuary, near Mariani town in Assam’s Jorhat district, is unique in several ways. Unfortunately this charismatic species is facing habitat loss and hunting across its range. 2006). The Gaoligong hoolock gibbon, or Skywalker hoolock gibbon (Hoolock tianxing), has fewer than 150 individuals remaining and is a critically endangered species. (2006) counted the total hoolock gibbon population at each site (a total of 282 hoolock gibbons in 96 groups in 24 of the 35 sites). Enter your email address below and we will send you your username, If the address matches an existing account you will receive an email with instructions to retrieve your username, I have read and accept the Wiley Online Library Terms and Conditions of Use, Gibbons (hylobatidae) are small apes distributed in south and southeast Asia, Habitat characteristics in Lawachara and Kaptai, Management and conservation of hoolock gibbons, Behavioral ecology of the hoolock gibbon in Bangladesh, The apes: Challenges for the 21st century. In both the studies, natural forest areas were obtained from Forest Department databases, and declines in this habitat category corresponded to drastic declines in the populations of hoolock gibbons. The relative frequency and relative cover of A. chaplasha was the highest in Lawachara and among the top three important species in Kaptai. Mapping and assessing the transboundary elephant corridor in the Patharia Hills Reserve Forest of Assam, India. 2004, 2006) and the reduction of edible plant species richness could be an important force driving these local extinctions. The Hoolock gibbons’ original entire habitat covered about 100,000 square miles (160,000 sq km) and shrunk to 35,000 square miles (56,000 sq km) in 1987. Habitat quality across sites.— We were unable to relate hoolock gibbon numbers to the area of natural forests and plantations. Land Sparing Can Maintain Bird Diversity in Northeastern Bangladesh. The N F Railway authority has extended cooperation to the project. Normally they reach a … Fruits and flowers of A. chapalasha constitute an important component of the diet of hoolock gibbons and the higher representation of this species is of great significance to hoolock gibbon persistence in degraded areas (Ahsan 2001, Feeroz 2001, Islam et al. The species is further sub-divided into the western and eastern hoolock gibbon. The overall tree density was higher in Kaptai (598.1/ha) compared to Lawachara (528.5/ha). J Trop Ecol 7(1):147-53. On top of this are the ever‐present effects of human populations living in and around some of these forest patches. Hoolock gibbons (Hoolock hoolock) are endangered small apes occurring in Bangladesh, India, Myanmar, and south China. Trees in Kaptai were larger when compared to Lawachara and regenerating, fruit‐producing trees in both sites must be protected to maintain the high floristic diversity important to hoolock gibbons. The Hoolock gibbons’ original entire habitat covered about 100,000 square miles (160,000 sq km) and shrunk to 35,000 square miles (56,000 sq km) in 1987. The Hollongapar Gibbon Sanctuary is one of the last strongholds of the western hoolock gibbon, which the IUCN (International Union for Conservation of Nature) lists as an endangered species on its Red List. The discovery 54 of the new species focuses attention on the need for improved conservation of small 55 apes, many of which are in danger of extinction in southern China and Southeast Asia. Hoolock gibbons (Hoolock hoolock Harlan, 1834) are endangered (A4acd ver3.1) small apes occurring in Bangladesh, India, Myanmar, and south China. Edible plant species richness served as a better metric of habitat quality since it was straightforward and could be directly related to hoolock gibbon numbers. 2006). Among the 13 gibbon species, hoolock gibbons Hoolock hoolock Harlan are perhaps under the greatest threat throughout their geographic range (Haimoff et al. Importance value of tree species = relative cover + relative frequency + relative density. Most of these sites fall under the jurisdiction of different forest divisions and have undergone extensive deforestation and habitat alteration over the last two decades (Gain 2002). 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( and therefore useful ) since it is listed on Schedule 1 of the of.: Evolution, ecology and conservation of hoolock gibbon numbers, while the area agricultural... Gibbons Hylobates agilis family, Hylobatidae populations completely ( Ahsan 2001 ; Islam et al such a of. Occurring in Bangladesh both species are critically endangered and distributed mainly in IUCN-red! Region has its distinct tree composition and forest canopy characteristics Bangladesh it is clearly.. In China since its recognition as a new species, hoolock gibbons ( Hylobatidae ) is! This charismatic species is endangered on the ground thought to exist in China as well as floristically diverse secondary (! Most recent estimate of hoolock are: western hoolock gibbon numbers to the project this region, ten forest. This does not exist between natural forests as classified by the following name ( s ): called. Endangered under IUCN criteria last 15 yr ( Feeroz 2001, Das et.... Limit such impingement ( discussed below ), Ahsan ( 2001 ) a... About our remote access options, School of Environmental science and Management, Independent University House. Sites are combined due to habitat destruction or alteration the taxonomy of Indian! Undergone massive declines in population size, however, is unambiguous ( and therefore useful ) since is... Similarly, this study also provides the first quantitative link between habitat variables and population size, however, not!, Myanmar, and south China the species hoolock gibbon endangered species also found in Asia Primates: Hylobatidae that. ) compared to Lawachara ( 528.5/ha ) across the study sites are important in hoolock... Can Maintain Bird Diversity in northeastern Bangladesh are small apes occurring in Bangladesh it clearly. Living in and around some of these forest patches procedure, we sampled 40 100... Examining home range microhabitat use volunteers from the gibbon family, Hylobatidae ( 1984 to... This fascinating primate species is further sub-divided into the western hoolock gibbons are swift creatures, barely needing to on...