Rhinoceros

Rhinoceros facts at a glance

How big is a rhinoceros?

An adult rhinoceros measures 3.8 m long — about 2.2× the height of an average adult person (1.73 m) — and weighs around 2300 kg, about 33× an average adult’s body weight (70 kg).

What is a group of rhinoceroses called?

Explore more animal collective nouns and baby animal names .

Horns of keratin

A rhino's horn is not bone but compacted keratin, the same protein found in hair and fingernails, and it keeps growing through life. Tragically, demand for horn in illegal markets has made rhinos a prime target for poachers, even though the horn has no proven medicinal value.

Five species, two continents

There are five rhino species: the white and black rhinos of Africa, and the greater one-horned, Sumatran, and Javan rhinos of Asia. White rhinos are grazers with a wide, square lip for cropping grass, while black rhinos are browsers with a hooked lip for grabbing leaves and twigs.

Senses and behavior

Rhinos have notoriously poor eyesight but compensate with acute hearing and a superb sense of smell. Despite their bulk, they can charge at up to 50 km/h (31 mph). They often wallow in mud, which cools their skin and protects it from sun and biting insects.

Conservation

Rhinos are among the most threatened large mammals on Earth, hammered by poaching for their horns and by habitat loss. The northern white rhino is functionally extinct, with only two females left, while the Javan and Sumatran rhinos are Critically Endangered. Intensive protection has helped some populations recover.

Did you know? Rhinoceros facts

• The rhinoceros is a massive, thick-skinned herbivore famous for the horn (or horns) on its snout, which is made of keratin, the same material as hair and nails.
• A rhino's horn is made of keratin, the same protein as human hair and nails, not bone. It grows continuously throughout the animal's life.
• There are five rhino species: the white and black rhinos in Africa, and the greater one-horned, Javan, and Sumatran rhinos in Asia.
• Despite weighing over two tonnes, a rhino can charge at up to about 50 km/h (31 mph), much faster than a human can sprint.
• Rhinos are killed for their horns, which are illegally traded for use in some traditional medicines and as status symbols, despite the horn having no proven medical benefit.
• Conservation: Near Threatened (IUCN).

Diet & feeding

Rhinoceros feeds primarily as a herbivore. There are five rhino species: the white and black rhinos of Africa, and the greater one-horned, Sumatran, and Javan rhinos of Asia. White rhinos are grazers with a wide, square lip for cropping grass, while black rhinos are browsers with a hooked lip for grabbing leaves and tw

Adaptations

• A rhino's horn is not bone but compacted keratin, the same protein found in hair and fingernails, and it keeps growing through life. Tragically, demand for horn in illegal markets has made rhinos a prime target for poachers, even though the horn has no proven medicinal value.
• There are five rhino species: the white and black rhinos of Africa, and the greater one-horned, Sumatran, and Javan rhinos of Asia. White rhinos are grazers with a wide, square lip for cropping grass, while black rhinos are browsers with a hooked lip for grabbing leaves and twigs.

Behaviour & ecology

• A rhino's horn is not bone but compacted keratin, the same protein found in hair and fingernails, and it keeps growing through life. Tragically, demand for horn in illegal markets has made rhinos a prime target for poachers, even though the horn has no proven medicinal value.
• There are five rhino species: the white and black rhinos of Africa, and the greater one-horned, Sumatran, and Javan rhinos of Asia. White rhinos are grazers with a wide, square lip for cropping grass, while black rhinos are browsers with a hooked lip for grabbing leaves and twigs.
• Rhinos have notoriously poor eyesight but compensate with acute hearing and a superb sense of smell. Despite their bulk, they can charge at up to 50 km/h (31 mph). They often wallow in mud, which cools their skin and protects it from sun and biting insects.

Communication

• Rhinoceros uses scent, posture, and vocal signals to mark territory and coordinate social behaviour.
• Communication intensity often peaks during breeding seasons and territorial disputes.

Habitat & range

Savanna, grassland, and tropical forest

Ecological role

Rhinoceros shapes vegetation through grazing or browsing and serves as prey for larger predators where ranges overlap.

Conservation status of the Rhinoceros

Sources & references

This guide is compiled and reviewed against established zoological and conservation references. Key sources for the Rhinoceros:

• IUCN Red List of Threatened Species

  Conservation status (Near Threatened) reflects the IUCN Red List category for Ceratotherium simum, most recently assessed in 2020.

• iNaturalist — observations & photos

  Search citizen-science observations and community IDs for Ceratotherium simum. Useful for range checks and recent sightings — not a substitute for formal Red List status.

• GBIF — occurrence data

  Global Biodiversity Information Facility species search for Ceratotherium simum. Explore published occurrence records used in range research.

• IUCN Red List — Ceratotherium simum.

  Conservation status (Near Threatened) and population trends.

• Animal Diversity Web — Ceratotherium simum. University of Michigan Museum of Zoology.

  Life history, morphology, and range.

• Wikipedia — Rhinoceros.

  General taxonomy and overview (cross-check primary sources).

• Global Animal Guide editorial standards

  How we research, source, review, and update every guide for accuracy.