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Arca

Water deer

Hydropotes inermis

Conservation status IUCN: Vulnerable· VU
Water deer (Hydropotes inermis)
Photograph from Wikimedia Commons · Wikipedia article (it)

Where the name comes from

Hydropotes is “water drinker”, from the Greek hýdōr and potḗs, for its habit of living in flooded reedbeds. Inermis is the Latin for “unarmed”, “weaponless”: it is the only deer in the world in which neither sex carries antlers. But the name lies, because it has weapons in plenty — only they are teeth, and in English it is indeed called the vampire deer.

Facts

Group
Mammals · Mammalia
Order
Even-toed ungulates
Habitat
Reedbeds, marshes, river islands, paddy fields
Range
Eastern China and Korea; naturalised in England and France
Size
77–100 cm of body, 9–15 kg
Diet
Herbivore — reeds, young grass, vegetables
Lifespan
10–12 years

Characteristics

  • 01

    The male has upper canines protruding up to eight centimetres.

  • 02

    The canines are mobile: he swings them back to eat and forward to fight.

  • 03

    It bears up to seven young, against the one or two of all other deer.

What sets it apart

It is the deer that gave up antlers and kept its tusks, and it is probably a portrait of what deer looked like before antlers were invented. In its fights the male does not lock horns: he charges sideways and slashes with the canines, opening long cuts on his rival’s back and shoulders. Antlers are remade every year and serve for display; tusks stay and serve to wound. Among living deer only this one and the musk deer have kept the old weapon, and they are also the two oldest.

Next species

North Atlantic right whale

Eubalaena glacialis