Greater One-horned Rhinoceros

Identification

The greater one-horned rhinoceros is Asia's largest rhino and the world's second-largest rhinoceros species. Adult males weigh 2.07–2.2 tonnes, while females are lighter at around 1.6 tonnes. This impressive animal is instantly recognizable by its single horn, which grows up to 57–62 cm long and consists entirely of keratin. Its thick, grey-brown skin forms distinctive pinkish folds, particularly pronounced on the neck and shoulders of males. The upper legs and shoulders are covered in wart-like bumps, giving the animal a uniquely textured appearance. Despite its substantial size, the greater one-horned rhino is nearly hairless except for eyelashes, ear fringes, and a tail brush.

Range & Habitat

This species is native exclusively to the Indian subcontinent, now restricted to the Indo-Gangetic Plain across 12 protected areas in northern India and southern Nepal. Its range has shrunk dramatically from historical times—fossils show that Pleistocene populations once ranged across mainland Southeast Asia, South China, and Java. Excessive hunting and agricultural development have confined the species to fragmented populations occupying less than 20,000 km² today. Despite this contraction, conservation efforts have allowed populations to recover from historic lows.

Behaviour & Diet

The greater one-horned rhino is primarily a grazer, feeding mainly on grasses but also consuming twigs, leaves, branches, shrubs, flowers, fruits, and aquatic plants. It is largely solitary outside the breeding season and when females are rearing calves. Females give birth to a single calf after a gestation period of 15.7 months, with birth intervals of 34–51 months. Captive individuals have been known to live up to 47 years. The species faces threats from various diseases, including anthrax and parasitic infections from leeches, ticks, and nematodes.

Best Time & Places to See It

The greater one-horned rhino can only be encountered in the protected areas of northern India and southern Nepal. The species remains vulnerable, with an estimated global population of around 4,075 individuals as of March 2025—a significant recovery from the early 1990s estimate of 1,870–1,895 individuals. This recovery is a testament to dedicated conservation efforts, though poaching continues to pose an ongoing threat. Visiting during the dry season typically offers the best wildlife-viewing opportunities.

Photography Tips

Photographing the greater one-horned rhino requires patience and respect for this vulnerable species. The animal's dramatic skin texture—the pinkish folds and wart-like bumps—provides excellent detail for close-up photography. Early morning and late afternoon light will best highlight the grey-brown coloration and distinctive features. Given the species' solitary nature and the restrictions of protected areas, guided visits with experienced naturalists offer the safest and most ethical approach to photography. Always maintain a respectful distance and follow local guidelines to minimize disturbance to these remarkable animals.