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Greater One-Horned Rhinoceros

Rhinoceros unicornis

Meet PJ

PJ is the Central Florida Zoo's resident greater one-horned rhino. There are five extant species of rhinos: black rhino, white rhino, greater one-horned rhino, Sumatran rhino, and Javan rhino. Today, few wild rhinos survive outside of national parks and reserves.

About the Species

Greater one-horned rhinos, also called Indian rhinos, are the second largest rhino species.

These rhinos weigh between 4,000-6000 pounds and can be over 6 feet tall. Their thick skin is an ashy gray, and has an armor-like appearance due to thick folds and tubercles. They have very little hair, only found around their eyes, along their ears, and at the tip of their tails. As their name suggests, they have only one horn about 8–25 inches long which will continue to grow throughout their lifetime. It proves to be helpful in searching for food and foraging for roots. Their herbivorous diet includes a variety of grasses, fruits, leaves and branches. Their upper lip is semi-prehensile, allowing them to use it to curl it around grass stems. The greater one-horned rhino has relatively poor eyesight, thus they must rely on their heightened sense of hearing to detect danger. Their ears work independently of each other, moving like satellites to pick up sounds around them. When startled, rhinos will charge, reaching speeds of up to 30 mph. Their sense of smell also plays a large role in communication. Greater one-horned rhinos are usually solitary beings, but several rhinos will defecate in the same spot, creating a midden (a large pile of dung that the rhinos can smell and learn about the rhinos in the area).

Words From the Experts


Like most greater one-horned rhinos, our male, P.J., loves to be in the water! It only takes a few weeks after birth for this semi-aquatic species to become a proficient swimmer. Watch him play in the water, and you might even see him blowing bubbles!



Did You Know?

A rhino's horn is not bone, but rather made of a protein called keratin. Keratin is found in your hair and nails, the feathers of birds, and the quills of porcupines!


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India and Nepal

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Length: 10–12 ft; Height: 5–6 ft | 3500-4850 lbs

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Grasses, fruit, leaves, branches

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Natural Defenses

Massive size

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Females give birth to 1 young

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Life Expectancy

Up to 40 years

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