By Richard Palmer
The heir to the throne and his elder son, who has inherited his father's passion for conservation, toured the zoo's Tiger Territory exhibit before the meeting and viewed two criticically endangered Sumatran tigers, Jae Jae and his mate Melati.
Their section of the zoo was closed to tourists and given a spruce up before the royal visit, including a heavy sprinkling of Hugo Boss perfume in the tiger enclosure.
That was not so much for the benefit of the Princes but for the tigers, although it was also used to make them more active while the royal visitors were there. "We use perfume because it stimulates them," said tiger keeper Teague Stubbington. "It stimuates their natural scent marking behaviour."
The keepers also kept back part of the tigers' breakfast of horse meat, complete with hair and hooves, to stimulate their hunting instincts.
William, 31, is determined to use part of his transitional year between leaving the RAF and starting a new, as yet undefined, role in public service in working to help the illegal trade in wildlife that is threatening species such as tigers, elephants, and rhino with extinction.
He has become president of United for Wildlife, a new alliance of seven leading conservation bodies working to end poaching.
He and Charles heard how new smart technology, including drones, next-generation cameras with special sensors, and new software will be used to help park rangers detect poachers more quickly.
The Royal Foundation of the Duke and Duchess of Cambridge and Prince Harry is expected to fund the introduction of some of the new technology, promising to "commit signifcant resources to increasing support for the most effective programmes on the ground". More....