Sri Lankan Spotted Chevrotain (Moschiola meminna)

The Sri Lankan spotted chevrotain (Moschiola meminna) is a diminutive ruminant belonging to the family Tragulidae, the most primitive group of even-toed ungulates. Endemic to the island of Sri Lanka, it inhabits the wet lowland rainforests of the southwestern and central highlands, as well as montane cloud forests above 1,200 m. Its coat is reddish‑brown with a distinctive pattern of white spots that break up its outline, providing camouflage among leaf litter. Unlike true deer, chevrotains lack antlers; both sexes possess elongated canine tusks used in intraspecific combat. The species is primarily nocturnal and crepuscular, relying on dense understory for cover. IUCN classifies M. meminna as Vulnerable due to habitat loss, fragmentation, and hunting pressure. Conservation efforts focus on protecting remaining forest blocks, establishing wildlife corridors, and monitoring populations through camera‑trap surveys. Current estimates suggest fewer than 10,000 mature individuals remain, making it a priority for Sri Lankan biodiversity initiatives.

Moschiola meminna is a solitary or loosely paired animal, with individuals maintaining overlapping home ranges of 2–4 km². Activity peaks at dusk and dawn, when the chevrotain forages on the forest floor, moving silently through leaf litter. Territoriality is low; scent marking via preorbital glands and occasional vocalizations—soft whistles and snorts—communicate presence to conspecifics. Males may engage in brief bouts of tusk‑clashing during the breeding season to establish dominance, but overt aggression is rare. The species exhibits strong anti‑predator behavior, freezing or bounding into dense cover when threatened. Home‑range fidelity is high, with individuals returning to the same sleeping sites—often shallow depressions under fallen logs—each night. Social interactions are limited to brief mating encounters and occasional mother‑offspring contact.

The Sri Lankan spotted chevrotain is a strict herbivore, browsing on a diverse array of understory vegetation. Its diet consists primarily of fresh leaves, young shoots, and tender twigs of forest shrubs such as Strobilanthes, Lantana, and various Rubiaceae species. Seasonal variation adds fruits, seeds, and occasional fungi during the monsoon, providing essential carbohydrates and micronutrients. An adult consumes roughly 150–200 g of foliage per day, selecting high‑protein leaves with low fiber content to maximize nutrient extraction. Chevrotains employ a selective feeding strategy, using their acute sense of smell to locate palatable plant parts while avoiding tannin‑rich or chemically defended foliage. Digestive efficiency is enhanced by a multi‑chambered stomach that ferments plant material, allowing extraction of volatile fatty acids crucial for energy. Water intake is met largely through the moisture of consumed vegetation, reducing the need for frequent drinking.

Sexual maturity is reached at about 10 months for females and 12 months for males. Breeding occurs year‑round but peaks during the rainy season (April–July), when food is abundant. After a gestation period of roughly 150 days, females give birth to a single fawn, which is concealed in a shallow nest of leaves for the first 10–12 days. The newborn is precocial, able to stand and follow the mother shortly after birth, but remains hidden to avoid predation. Lactation lasts about 8 weeks, during which the mother provides milk rich in protein and fat. Juveniles attain independence at 3–4 months and reach full adult size by one year. Reproductive output is low, with females typically producing one offspring per year, contributing to the species’ vulnerability under increasing anthropogenic pressures.

Moschiola meminna is listed as Vulnerable on the IUCN Red List, with an estimated population of 5,000–10,000 mature individuals. The primary threat is habitat loss due to conversion of primary forest to tea plantations, rubber estates, and urban development, resulting in a 30 % reduction in suitable habitat over the past three decades. Fragmentation isolates subpopulations, limiting gene flow and increasing inbreeding risk. Illegal hunting for bushmeat and traditional medicine, though less intense than for larger mammals, adds mortality pressure, especially in lowland areas. Road mortality is an emerging concern as new highways bisect forest corridors. Climate change may alter the phenology of key food plants, potentially reducing forage availability during critical breeding periods. Conservation actions include expanding protected area networks, enforcing anti‑poaching laws, and promoting community‑based forest stewardship. Ongoing population monitoring using camera traps and genetic sampling aims to assess trends and guide adaptive management.

• The Sri Lankan spotted chevrotain is the smallest hoofed mammal in the world, weighing less than a domestic cat.
• Both males and females possess elongated canine tusks, which are used in ritualized combat rather than for feeding.
• Unlike most ungulates, chevrotains lack antlers or horns; their primitive anatomy reflects an early branch of ruminant evolution.
• They can remain motionless for several minutes, relying on camouflage to avoid predators such as leopards and large birds of prey.
• Their footpads are equipped with scent glands that release a musky odor, helping individuals mark territory and communicate reproductive status.