Catherine, the Duchess of Cambridge, and her husband, Britain’s Prince William, watch as their son Prince George reacts after they looked at an Australian animal called a Bilby, which has been named after the young Prince, at Sydney’s Taronga Zoo

Catherine, the Duchess of Cambridge, and her husband, Britain’s Prince William, watch as their son Prince George reacts after they looked at an Australian animal called a Bilby, which has been named after the young Prince, at Sydney’s Taronga Zoo

Catherine, the Duchess of Cambridge, and her husband, Britain’s Prince William, watch as their son Prince George reacts after they looked at an Australian animal called a Bilby, which has been named after the young Prince, during a visit to Sydney’s Taronga Zoo April 20, 2014. The Prince and his wife Kate are undertaking a 19-day official visit to New Zealand and Australia with their son George. REUTERS/David Gray (AUSTRALIA – Tags: ROYALS ENTERTAINMENT)