# Chevrotain — Facts, Threats & Conservation

*Tragulus spp.; silver-backed form Tragulus versicolor (Thomas, 1910) — family Tragulidae*

> Chevrotains are tiny Tragulidae hoofed mammals called mouse-deer but not related to deer; the silver-backed chevrotain was rediscovered in Vietnam in 2019 on camera trap after decades without confirmed records.

**IUCN status:** Varies by species — silver-backed chevrotain rediscovered in Vietnam 2019 after decades without records  ·  **WARN range:** Southeast Asia, Vietnam, Laos, Borneo and Sundaland forests

## Quick facts
| Fact | Value |
| --- | --- |
| Size | Under 2 kg in smaller species |
| Canines | Tusk-like in males |
| Rediscovery | Silver-backed — Vietnam 2019 |
| Not | True deer (Cervidae) |
| Activity | Secretive; often nocturnal |
| Main threats | Snaring; oil palm, pulpwood, mining |

## Scientific classification
- **Kingdom:** Animalia
- **Phylum:** Chordata
- **Class:** Mammalia
- **Order:** Artiodactyla
- **Family:** Tragulidae
- **Genus:** Tragulus
- **Species:** Several; T. versicolor rediscovered 2019

## Conservation status
- **Status:** Not Evaluated
- **Population:** Unknown for most species
- **Trend:** Decreasing where snaring intensity is high
- **Assessed:** 2019–2020
- **CITES:** Not listed (most species)
- IUCN status varies by species (T. versicolor Data Deficient; several threatened). 2019 rediscovery of silver-backed chevrotain highlighted persistence in snared landscapes, not population security.

## Key facts: Chevrotain
- Chevrotains are mouse-deer in name only — they belong to Tragulidae, not the deer family Cervidae.
- Males bear tusk-like upper canines used in fights, unlike antlered deer.
- The silver-backed chevrotain was rediscovered in Vietnam in 2019 after going unrecorded for decades — proof of how little we know about understorey mammals.
- Snaring and bushmeat hunting remove chevrotains across Southeast Asia; oil palm and pulpwood conversion removes understorey habitat.
- Several species are Data Deficient or Endangered with poor survey data — absence of records often means absence of search, not absence of animals.
- WARN's deer guide at /wildlife-guides/deer/ covers true deer for comparison — antlers, Cervidae biology and different conservation framing.

## Not a deer
True deer — red deer, roe deer, muntjac in the strict modern sense — belong to Cervidae, with antlers or small antlers in males and a ruminant lifestyle scaled to their size. Chevrotains are tragulids: no antlers, elongated canines, simpler stomachs closer to non-ruminant artiodactyls, and a body plan miniaturised for dense understorey.

The confusion is linguistic. 'Mouse-deer' describes appearance — tiny, deer-like legs, cautious gait — not genealogy. WARN's deer guide explains cervid identification and ecology; chevrotains need their own frame because snaring campaigns and habitat advice differ when the animal weighs less than two kilograms and hides by day.

## The silver-backed rediscovery
Tragulus versicolor was known from specimens collected in the early twentieth century, then effectively vanished from scientific record. Vietnam's forests continued to be logged, snared and fragmented. In 2019 a team deployed camera traps in coastal lowland forest and obtained the first confirmed images in decades.

Rediscovery is not recovery. The species' range and population remain unknown; the IUCN lists it Data Deficient or with heightened concern depending on assessment date. The event shows how understorey mammals can persist unseen while trade and conversion continue — and how quickly they can disappear when snares are indiscriminate.

## Snares, trade and plantation conversion
Mainland and Sundaland forests face industrial snaring for bushmeat markets — wire loops that catch everything walking a game trail, including chevrotains. Oil palm and pulpwood replace forest with monoculture; mining opens access. Wildlife trade in Southeast Asia is not only rhino horn and ivory; local bushmeat networks supply urban demand.

Chevrotains are too small for trophy trade but perfect snare size. Forest that looks green from above may be empty at ground level where snare lines run. Protection requires anti-snaring patrols and demand reduction, not only protected-area boundaries on maps.

## Ancient ungulates in modern landscapes
Tragulids are among the most primitive living hoofed mammals — a lineage that diverged early from the branch that became deer, cattle and antelope. They survived by staying small and secretive. That strategy fails when every forest path carries a snare.

On Borneo and Sumatra, lesser and greater mouse-deer species share understorey with banteng and bearded pigs at different scales of the same converted landscape. Chevrotain conservation is ungulate conservation at the smallest scale — and among the least visible.

## What WARN does
WARN publishes free, sourced species education for animals hidden in the understorey. Chevrotains are not deer — and the 2019 silver-backed rediscovery shows both how much remains unknown and how fast snaring and plantation conversion can erase it.

If this guide helps you understand wildlife and the pressures it faces, a gift to WARN supports habitat protection and free public education in our partner countries.

## Frequently asked questions: Chevrotain
### Is a mouse-deer a deer?
No. Chevrotains are in the family Tragulidae, separate from true deer (Cervidae). WARN's deer guide at /wildlife-guides/deer/ covers real deer.

### What was rediscovered in Vietnam in 2019?
The silver-backed chevrotain (Tragulus versicolor), filmed on camera trap after decades without confirmed records.

### Why do chevrotains have fangs?
Males have elongated upper canines used in territorial fights — the tragulid substitute for antlers.

### How big is a chevrotain?
Some species weigh under two kilograms and stand around thirty centimetres at the shoulder — rabbit-sized hoofed mammals.

### What threatens chevrotains?
Snaring for bushmeat, forest conversion for oil palm and pulpwood, and hunting access via logging and mining roads across Southeast Asia.

### Where do chevrotains live?
Dense tropical forest understorey from India through mainland Southeast Asia to Borneo and Sumatra — secretive, mainly nocturnal or crepuscular.

### Are mouse-deer / chevrotains dangerous?
Mouse-Deer / Chevrotains are not generally dangerous to people. Chevrotains are tiny Tragulidae hoofed mammals called mouse-deer but not related to deer; the silver-backed chevrotain was rediscovered in Vietnam in 2019 on camera trap after decades without confirmed records. Give wild individuals space and do not corner or handle them.

## Sources
- [Nature Ecology & Evolution — silver-backed chevrotain rediscovery](https://www.nature.com/articles/s41559-019-1021-7)
- [IUCN Red List — Tragulidae](https://www.iucnredlist.org/search?taxonomies=100085&searchType=species)

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Full guide: https://worldanimalrescuenetwork.org/wildlife-guides/chevrotain