One of the 5 rhinoceroses on WAnimals

Mammals · Perissodactyla · Rhinocerotidae

Greater One-horned Rhino

Rhinoceros unicornis

Vulnerable

It faces a high risk of extinction in the wild over the medium term. See full glossary

It is one of the great rhino conservation success stories: from barely 200 animals at the start of the twentieth century, the population has recovered to over 3,500-4,000.

Weight

1.6 t – 3 t

Size

3 m – 3.8 m

Lifespan

35 years

Diet

Herbivore

Feeds mainly on plants.

Activity

Irregular activity

Active at irregular times, by day or night depending on circumstances.

Social structure

Solitary

Lives and hunts alone, joining others only to breed.

Sighting difficulty

Moderate

Fun facts

  • Unlike other rhinos, the folds of its skin form plates that give it the look of articulated armour.
  • It feeds on grasses, leaves, twigs, fruit and water plants.
  • It lives in the alluvial grassland and riverine forest of northern India and southern Nepal.
  • anatomíaIts horn is not bone but compacted keratin, the same substance as human hair and nails.
  • fisiologíaIts thick skin folds deeply and looks like armour, but it is in fact sensitive and will sunburn if the animal does not wallow in mud regularly.

Life cycle & biology

Skeleton type
Vertebrate - internal bony skeleton (mammal)
Habitat & environment
Alluvial grassland and riverine forest of northern India and southern Nepal
Birth weight
40 - 81 kg (average ~64.5-70 kg)
Size at birth
Smoother-skinned than the adult, with folds that deepen with age
Sexual maturity
Female: 4-7 years | Male: 7-9 years physically, though it does not breed effectively until it wins dominance
Gestation / incubation
425-496 days (~15.5-16 months)
Litter / clutch size
1 young, with an interval between births of 3-4 years
Lifespan in captivity
Documented record of 43.5-47 years in captivity (though the 47-year figure is disputed)

Sources consulted: A-Z Animals; Animal Diversity Web; AnAge (genomics.senescence.info); Animals Time; Rhino Resource Center; Ultimate Ungulate; Animalia.bio; Animal Corner; PMC (reproductive tract tumours study)

Where to watch it

Parks and dive sites where this species has been documented.

Related species

Other species in the catalogue with the most in common with Greater One-horned Rhino — same habitat, park, country, tags or family.

How to help

The greater one-horned rhino is classified as vulnerable. Organizations such as UICN, WWF y Wildlife Conservation Society work specifically on its conservation and that of its habitat; looking into their programs is a good starting point if you want to get involved.

It's documented in 5 real protected areas — part of why protecting these places matters for its conservation.

Keep exploring

Based on what we already know about greater one-horned rhino.

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