The Duke and Duchess of Cambridge have got up close and personal with the wildlife during a jeep safari in one of India’s most famous national parks.
Standing up in the back to get a better view, the royal couple spent an hour driving along rough tracks through the verdant jungle.
They also helped feed some of the park’s baby rhinos and elephants using a bottle.
The rhinos’ valuable horn is trafficked across much of Asia and demand is rising because it is being marketed as more potent than African horn.
Kaziranga, in Assam state, is on a flood plain and the annual rains drive animals up into the adjacent hills.
But an increasing number of villages are springing up along this ancient corridor for the park’s elephants and rare one-horned rhinos.
Prince William spoke to the rangers who are at the forefront of the fight to protect the animals.
On Sunday, a rhino was killed bringing the total to six so far this year.
One of the Rangers, Salim Ahmed, said: “It has been a nice experience and we are lucky to interact with them, happy to met them.”
Prince William, who set up the United for Wildlife group to coordinate efforts to stop the illegal wildlife trade, has been criticised in the past for still going shooting with members of his family, including brother Prince Harry.
Last month, he said commercial hunting could have a positive impact on efforts to save endangered species if money raised went back into the protection of species under serious threat.
Their trip comes just days after a popular rhino in Zimbabwe had to be put down after it was shot and injured by poachers.
William and Kate will also later meet young film-makers who are members of Green Hub, which teaches film-making as a vocational skill to young people across northeast India.
The couple will wrap up their day at a project set up by Mark Shand, the late brother of the Duchess of Cornwall, who devoted his life to the protection and care of elephants.
The Kaziranga Discovery Park is the first of its kind health clinic for working elephants.
On Thursday, the royal couple will visit the Himalayan kingdom of Bhutan for two days before wrapping up the tour on Saturday back in India at the Taj Mahal.
During their visit they have sat down for talks with India’s prime minister, Narendra Modi, and discussed pressures facing the steel industry.