"President S R Nathan commissioned this book in 2005. In more than a decade that has passed since, many readers have derived much joy from the many beautiful illustrations and photography of birds seen at the Istana. As we commemorate Istana's 150th anniversary this year, I have therefore thought it would be most appropriate that we update the book with the latest bird audit. The latest bird audit is accompanied by new information, beautiful illustrations and photographs of birds recorded within the grounds, either resident or visiting"--Foreword (page 7).