Trachypithecus pileatus | Red List of Bangladesh Volume 2: Mammals

Taxa
Trachypithecus pileatus | (Blyth, 1843)
Publication
Red List of Bangladesh Volume 2: Mammals
NRL Record ID
327686
Location
Countries in Assessment
Bangladesh
Country ISO code(s)
BGD
Does the assessment cover a marine EEZ area(s)?
Off
Scope (Assessment)
National
Taxon
RRL Synonyms
Simia pileata Shaw, 1800; Macacus sinicus Kelaart, 1852; Macacus pileatus Blyth, 1863; Presbytis pileatus Blyth, 1843
Taxonomic Group
Vertebrates
Taxonomic Group Level 2
Mammals
Assessed taxon level
Species
Taxonomic Notes
Four subspecies are currently recognized, although their validity is in some doubt (it is thought that seasonal variation in pelage color may account for at least some of the variation) Das et al. 2008. Of these, only two subspecies viz. T. p. durga and T
Taxon distribution as listed in assessment
This species is found in Bangladesh, Bhutan, India and Myanmar (Das et al. 2008). Of the three species of Langurs, this species has the widest distribution. It occurs in all forest ecosystems, barring the Sundarbans which never had any of the primates but the Rhesus Macaque. In the early 1970s and 1980s it occurred in Gazipur District to Jamalpur, Sherpur, Netrokona and Mymensingh under Dhaka Division to the forests in Sylhet and Chittagong Revenue Divisions. At the current time it has just a handful specimens left in Mymensingh Division when rests are present in the mixed evergreen forests of Sylhet and Chittagong Divisions (Khan 1981, 2015).
Habitats and Ecology
Ecological system type
Terrestrial system
No
Freshwater system
No
Marine system
No
Habitat
Habitat details as listed in assessment
This species is found in the dense forest and bamboo patches of both moist deciduous and mixed evergreen forests. It generally prefers middle canopy, but also uses the top and lower canopy of the forests. It also uses forest floor for feeding and moving. This species is diurnal and predominantly arboreal. It lives in single male multi-female groups and group size varies from 2 to 15 Langurs. It is mainly folivorous and the food supplemented by fruits, flowers and nectar. It drinks water from water accumulated in tree trunks and rarely from a ground level water body. It often sits and forages in trees along the bridle paths and roads passing through a forest.
Is there a map available in assessment?
Yes, in the publication/on website
Assessed status
Asessment status in full
Critically Endangered
Assessment status abreviation
CR
Assessment rationale/justification
This species has been categorized as Endangered in view of the decline in of 50% of its Extent of Occurrence and Area of Occupancy and habitat quality over three generations. Moreover, there exist less than 250 individuals in each subpopulation.
About the assessment
Assessment year
2015
Assessors/contributors/reviewers listed
Md. Mofizul Kabir
Affliation of assessor(s)/contributors/reviewers listed on assessment
NGO
Academic
Assessor affiliation specific
Academic|NGO
Criteria system
Criteria system specifics
IUCN v3.1 + Regional Guidelines v4.0
Criteria system used
IUCN
Criteria Citation
IUCN (2012) IUCN Red List Categories and Criteria: Version 3.1. Second edition. Gland, Switzerland and Cambridge, UK: IUCN. iv + 32pp; IUCN (2012) Guidelines for Application of IUCN Red List Criteria at Regional and National Levels: Version 4.0. Gland, Switzerland and Cambridge, UK: IUCN. iii + 41pp.
URL (link) of redlist assessment or publication
http://iucnredlistbd.org/
Endemism
Endemic to region
No
Endemism Notes
Is an endemic?: No
Conservation
Conservation Measures

Conservation measures:
Conservation measures notes:
Required conservation measures:

Further information
History
Endangered in Bangladesh (IUCN Bangladesh 2000).
Scientific Name Kingdom Phylum Class Order Family Genus
Trachypithecus pileatus Animalia Chordata Mammalia Primates Cercopithecidae Trachypithecus