Mammals

Water chevrotain

Hyemoschus aquaticus

A small, archaic-looking African ruminant, the water chevrotain has tusk-like canines and, when threatened, plunges in and escapes underwater. It is the largest chevrotain.

Characteristics

Scientific nameHyemoschus aquaticus
Weight8–13 kg
Lifespan10–14 anni
SizeSmall, little larger than a small dog
Energy3/5

Temperament

Nocturnal, solitary, shy, semi-aquatic

Diet

Frugivore: fallen fruit, leaves, shoots, invertebrates

An ungulate of ancient aspect

The water chevrotain, also known as the fanged deer, is a small ruminant that preserves many traits of the ancestors of today's even-toed ungulates. It has a stocky, arched body, slender legs and a reddish-brown coat dotted with white spots and stripes that mimic the dappled light of the forest floor. Unlike deer it bears no antlers: instead the males sport elongated, tusk-like upper canines used in fights between rivals. It is the largest of the roughly ten chevrotain species, yet it is barely bigger than a small dog.

Habitat and distribution

It lives in the rainforests and along the watercourses of West and Central Africa, always close to rivers, streams and swamps. It is a water-bound animal, favouring the dense bankside vegetation where it finds both food and shelter.

Behaviour

It is nocturnal, solitary and very shy. It spends the day hidden in vegetation and becomes active at dusk to feed on fallen fruit, leaves, shoots and, occasionally, small invertebrates and carrion. Its escape strategy is unusual for an ungulate: when pursued by a predator it throws itself into the water and swims, even staying partly submerged, to shake off its trail.

Curiosities

Chevrotains are regarded as among the living ruminants most similar to the ancestral forms that appeared tens of millions of years ago — true "living fossils". Despite some common names likening it to musk deer, the water chevrotain is not related to the Asian musk deer at all: the resemblance is only superficial.

Conservation

The IUCN lists the species as Least Concern, but populations are affected locally by hunting for meat and by forest loss. Its elusive nature makes it hard to estimate numbers with any precision.

Pros

  • The largest and most striking of the chevrotains
  • Remarkable escape strategy into water
  • Archaic traits that make it a "living fossil"

Cons

  • Extremely elusive, rarely seen
  • Locally threatened by hunting and deforestation
  • Not a pet: highly specialised wild needs

FAQ

Why is it called the fanged deer?
The males have no antlers but elongated, tusk-like upper canines, which they use in fights with rivals. Hence the nickname fanged deer.
Is it really tied to water?
Yes. It lives near rivers and swamps and, when threatened, dives in and swims, even staying partly submerged to evade predators.
Is it related to musk deer?
No. Despite some misleading common names, it is not related to the Asian musk deer: it belongs to the chevrotain family, the Tragulidae.
Is it a threatened species?
It is listed as Least Concern by the IUCN, but hunting for meat and forest destruction reduce its populations locally.

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