IUCN Otter Specialist Group . . . leading global otter conservation Last Update: Tuesday March 3, 2015
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Lutra sumatrana (Gray, 1865), the Hairy-Nosed Otter
Revised 3rd March 2015 by Aadrean, Species Representitive

:: Lutra sumatrana

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None currently available

More photos would be welcomed



A medium-sized otter, 95-133cm in length and weighing 5-8kg. The paws are fully webbed with well-developed claws. The fur is dark brown above, slightly paler underneath with a contrasting pale chin and upper lip. The whole nasal area (rhinarium) is covered in short, dark fur.

DNA work has established that this is a true species - some authors previously considered it to be a subspecies of Lutra lutra.

CITES Identification Sheet


This species is found in undisturbed habitats in South-east Asia. The tiny amount of information available suggests this species inhabits peat swamp forests, flooded forest, lowland Dipterocarp forest, freshwater swamp forest, and estuaries dominated by Nypa and mangroves.


This species is endemic to South-east Asia. There are recent records from various, mostly highly dispersed localities in Southeast Asia, in Thailand, Viet Nam and Cambodia, Malaysia, Brunei, and Indonesia (Sumatra and Borneo). Historical records suggest this species formerly inhabited mainland South-east Asia including Myanmar and Lao PDR, although this information is still questionable.

Conservation Status

Red List Category & Criteria: Endangered, Population decreasing
Year Assessed: 2014
Assessors: Aadrean
Evaluators: Hussain, S.A. (Otter Red List Authority)

There is no information available about population size or the number of mature animals. There is only fragmented reliable information about the species' geographic range.

Current Concerns

Very little is known, but it is likely that this species is threatened by destruction of peat swamp forests for logging and agriculture, and a very high degree of population fragmentation makes populations numerically vulnerable. Furthermore, cubs of this species have been found in several cases of pet trading in Indonesia.

Research is critically needed on all aspects of this species' ecology and biology, with the population status and habitat use across the range as priority. It is protected at international and national levels, but legislation at local level, and its enforcement are urgently needed. This species is so rare that there is a good case for ex situ conservation measures (captive breeding and maintenance) to be undertaken.

Leading Researchers

Source: Padma K de Silva, IUCN/SSC Asian coordinator

Budsabong Kanchanasaka   Thailand   Home range studies on hairy nosed otter
Reza Lubis   Indonesia   Survey on the status and distribution of hairy nosed otter in Sumatra (Indonesia).
N. X. Dang & Hiroshi Sasaki   Vietnam   DNA studies on hairy nosed otters.

Key Publications

News on Threats

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