The Duke And Duchess Of Cambridge Tour Australia And New Zealand - Day 11 [Getty Images]

WINMALEE, AUSTRALIA - APRIL 17: Prince William, Duke of Cambridge plants a Summer Red Eucalyptus tree at Winmalee Guide Hall in Yellow Rock during the eleventh day of their official tour to New Zealand and Australia on April 17, 2014 in Winmalee, Australia. The Duke and Duchess of Cambridge are on a three-week tour of Australia and New Zealand, the first official trip overseas with their son, Prince George of Cambridge. (Photo by Anthony Devlin - Pool/Getty Images)

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