Forever in their hearts. Bindi Irwin and Robert Irwin have paid tribute to their father, Steve Irwin, many times in the years since his heartbreaking death. Steve - a wildlife conservationist and beloved television personality - died at age 44 after being pierced by a stingray barb in September 2006. He was survived by his children and his wife, Terri Irwin. Although Bindi and Robert were only 8 and 2 at the time of their father's passing, they've grown to carry on his legacy in ways both big and small.