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World Rhino Day is observed on September 22 every year. (Image: Canva)
M
Moneycontrol•22-09-2026, 10:19
World Rhino Day 2026: The Science Behind a Rhino's 16-Month Pregnancy
  • •World Rhino Day, observed on September 22, highlights rhino conservation and threats.
  • •Rhinos, particularly the greater one-horned rhino, have a gestation period of 15-16 months for a single calf.
  • •This extended pregnancy allows the calf to develop significantly, resulting in a large newborn weighing 50-70 kg.
  • •Mothers invest substantial biological energy into a single offspring, and maternal care continues long after birth.
  • •The slow reproductive cycle has critical conservation implications, making every successful birth vital for species facing habitat loss and poaching.

Key Questions Answered

For the greater one-horned rhino, also known as the Indian rhino, gestation typically lasts around 15 to 16 months before giving birth to a single calf.

A newborn greater one-horned rhino can weigh around 50 to 70 kilograms, allowing it to be well-developed at birth rather than tiny and helpless.

The latest International Rhino Foundation data puts the species' population in India at 3,323, based on figures available as of 2024.