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Smooth - coated Otter
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Smooth - coated Otter
นากใหญ่ขนเรียบ


  Animal Information


Common Name (Thai): นากใหญ่ขนเรียบ

Common Name (English): Smooth - coated Otter

Scientific Name: Lutrogale perspicillata


 Average Lifespan


4–10 years in the wild and up to 20 years in captivity


Size and Weight


7–11 kg


 Places to Visit

  • Khao Kheow Open Zoo

    Chiang Mai Zoo

    Nakhon Ratchasima Zoo

Current Animal Count (7 Zoo)
Male
0
Female
1
Unspecified
0

Meet the Smooth-Coated Otter: The Water World's Sleekest Superstar!

            These animals boast rounded heads and short, glossy fur that shines like it’s been polished. Their small ears have a clever seal-like mechanism to keep water out, while flat tails and large webbed feet make them swimming champions. Add in their super-sensitive whiskers—like built-in sensors for detecting even the slightest vibrations from underwater creatures. Smooth-coated otters are also incredible team players, often hunting together in groups to secure their catch.




 
Interesting Facts


Prominent Characteristics: 

 The smooth-coated otter exhibits distinct characteristics that set it apart from other otter species, such as the Eurasian otter and the hairy-nosed otter. Its rounded head and a distinct inverted V-shaped fur pattern on the snout are key identifying features. This species possesses a double-layered coat: the outer layer consists of sleek, water-repellent guard hairs that cover the dense, shorter underfur, which helps retain body heat while in water. Its small ears are equipped with specialized flaps that close during swimming to prevent water entry. The body fur is typically dark brown to light brown, with a lighter coloration on the underside. Its flattened tail constitutes approximately 60% of its body length and aids in swimming. The paws and digits are relatively large. Adult smooth-coated otters measure about 100 to 130 centimeters in total length, including the head, and weigh between 7 and 11 kilograms. Males are significantly larger than females, a characteristic commonly observed in the species.

 

 This species typically inhabits lowland wetlands such as lakeshores, streams, and canals. Its whiskers are highly sensitive and serve as tactile sensors, detecting vibrations generated by underwater movements of prey and other organisms. Smooth-coated otters are versatile foragers, active both day and night, and are commonly found in small family groups. However, in areas with abundant food resources, they may form larger social groups. These otters are also equipped with strong paws and claws, allowing them to dig burrows along riverbanks. Their burrows can extend up to three meters deep, providing shelter and safety for the group. 


Primary Diet:

The natural diet of the smooth-coated otter primarily consists of fish, shrimp, crabs, mollusks, amphibians, and small mammals found near aquatic habitats. In zoological settings, their diet includes fish, along with high-protein supplements such as chicken meat and other animal proteins, as well as crabs, shrimp, and mollusks, tailored to the specific requirements of each facility.

 

Habitat:
 
            The smooth-coated otter is found in central India, Nepal, Sikkim, Myanmar, Thailand, Cambodia, Vietnam, Malaysia, Sumatra, and Borneo. It inhabits rivers, large streams, floodplains, reservoirs, and mangrove forests, preferring areas with abundant water sources.

 

Reproduction:

            The smooth-coated otter reaches sexual maturity at around 2 years of age and mates once a year. The breeding season occurs between August to December. The gestation period lasts approximately 61–65 days, with litters typically consisting of 2–5 pups. The pups are weaned at around 130 days of age. 

 

Lifespan: 

In the wild, the average lifespan of the smooth-coated otter ranges from 4 to 10 years, while in zoological settings, they may live up to 20 years.

 
Conservation Status:

            The smooth-coated otter is currently listed as Vulnerable (VU) by the International Union for Conservation of Nature (IUCN). [MOU1] 

            The primary threats to its population include habitat loss in wetlands due to large dam construction, urbanization, agriculture, illegal hunting, and chemical pollution in water sources. In Thailand, the smooth-coated otter is a protected species under the Wildlife Preservation and Protection Act of 2019. 

 

Interesting Fact: 

Smooth-coated otters are known to hunt in groups, working together to corral fish for easier capture. Their intelligence has even led to domestication by fishermen in countries like India, Pakistan, and Bangladesh, where they are trained to herd fish into nets.



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