Kate Middleton got to feed a young elephant and play with a baby rhino during a visit to the Centre for Wildlife Rehabilitation and Conservation (CWRC) at Panbari reserve forest in Kaziranga, in the northeastern state of Assam, India.

Royal tour India
Kate Middleton plays with a baby rhino at the conservation centreAdnan Abidi/Reuters
Royal tour India
The Duchess of Cambridge feeds a young rhinoAdnan Abidi/Reuters
Royal tour India
Kate Middleton feeds a baby elephant at the Centre for Wildlife Rehabilitation and Conservation at Panbari reserve forest in KazirangaAdnan Abidi/Reuters
Royal tour India
Prince William and Kate Middleton feed baby elephantsArthur Edwards
Royal tour India
The Duchess of Cambridge plays with baby rhinosArthur Edwards
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The Duchess of Cambridge paints a carved elephant at the Mark Shand Foundation in Kaziranga National ParkChris Jackson/Getty Images
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Kate claps as her husband cracks a coconut at the national parkChris Jackson/Getty Images
Royal tour India
People wait for the royal couple to arrive at Pan Bari agricultural villageChris Jackson/Getty Images
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A young girl awaits the arrival of the royalsChris Jackson/Getty Images
Royal tour India
Locals wait for the Duke and Duchess of Cambridge to arriveChris Jackson/Getty Images
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Two boys await the arrival of Kate and William at the Pan Bari agricultural villageChris Jackson/Getty Images
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The Duke and Duchess of Cambridge visit the Pan Bari agricultural village in Kaziranga National ParkChris Jackson/Getty Images
Royal tour India
Kate Middleton poses as she visits the Pan Bari agricultural village in Kaziranga National ParkChris Jackson/Getty Images
Royal tour India
Kate Middleton meets young children as she visits the Pan Bari agricultural village in Kaziranga National ParkChris Jackson/Getty Images
Royal tour India
Kate Middleton has a cup of tea at the Centre for Wildlife Rehabilitation and Conservation in Assam stateArthur Edwards
Royal tour India
The Duke and Duchess of Cambridge visit a village tea garden in Kaziranga, Assam stateBiju Boro/AFP

Prince William and Kate Middleton headed out in a jeep first thing in the morning for a wildlife safari at the Kaziranga National Park, home to the world's largest population of the rare one-horned rhino. The global conservation group WWF estimates there are about 3,500 left in the world, mostly in north-eastern India, with a few hundred in neighbouring Nepal.

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The royals are driven through the national parkHeathcliff O'Malley
Royal tour India
The Duke and Duchess of Cambridge go on a game drive at Kaziranga National ParkHeathcliff O'Malley

Although their numbers have increased significantly since the early 1990s, when their numbers were estimated at fewer than 2,000, the animals are under threat from wildlife poachers and habitat loss. Already this year, six rhinos have been killed for their horns, after 20 were poached in 2015.

The royal couple were joined by a park official as guide on a tour across dirt tracks, tall grasslands and thick evergreen forest. They met a group of forest rangers and wildlife wardens at an anti-poaching camp inside the reserve, which is also home to other endangered species such as swamp deer and the hoolock gibbon. VS Bhaskar, a top Assam state government official, said the royal couple saw rhinos, wild boars, buffalo, hog deer and a variety of birds.

Prince William asked the forest rangers about the conservation challenges they face, he said. The rangers told him that the poachers were using sophisticated automatic weapons, whereas the forest guards had old rifles, which were being upgraded.

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A one-horned rhino crosses a path during the royal couple's safariHeathcliff O'Malley
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The royals are pictured during their safariHeathcliff O'Malley
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The Duke and Duchess of Cambridge pose with park rangersHeathcliff O'Malley
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Prince William chats to rangers at the national parkHeathcliff O'Malley
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The Duchess's safari shoesBiju Boro/AFP
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A forest guard protects an elephant before the royal arrivalAdnan Abidi/Reuters
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Kate is given a scarf by an Indian forest officialBiju Boro/AFP
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A guide instructs the royal couple before they leave for a game driveChris Jackson/Getty Images
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An Indian elephant flaps its ears at Kaziranga National ParkChris Jackson/Getty Images

The royal couple had enjoyed an evening around the campfire as local artistes performed folk dances. The royal couple's visit comes a day ahead of Assam's local festival, Bihu, which marks the beginning of Assamese New Year and signifies the time of harvest.

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Prince William and Kate Middleton watch a young dancer performChris Jackson/Getty Images
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Kate Middleton arrives for a Bihu Festival celebration at Diphlu River LodgeChris Jackson/Getty Images
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Prince William's safari shoesChris Jackson/Getty Images
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The shoes worn by Kate Middleton at the festival celebrationChris Jackson/Getty Images
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The Duke and Duchess of Cambridge pose with performers at the lodgeChris Jackson/Getty Images
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Kate watches dancing by the fireside at Diphlu River LodgeChris Jackson/Getty Images
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Dancers smile at Diphlu River LodgeChris Jackson/Getty Images
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A man plays a musical instrumentChris Jackson/Getty Images
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Dancers perform for the royal coupleChris Jackson/Getty Images

The couple have spent much of their first three days in India meeting children and charities which work with them. They will leave for the isolated Himalayan kingdom of Bhutan on Thursday (April 14), before returning to India on Saturday (April 16) to visit the Taj Mahal.