Terri Irwin Pictures

Robert Irwin and his Mother Terri embrace during his fifth birthday celebrations at Australia Zoo on December 1, 2008 on the Sunshine Coast, Australia. Robert (Bob) Irwin is the only son of the late wildlife warrior Steve Irwin, who was killed by a stingray in 2006. (Photo by Bradley Kanaris/Getty Images AsiaPac)

Bindi, Terri and Robert Irwin attend the official launch of the Australian Wildlife Hospital at Australia Zoo on November 15, 2008 on the Sunshine Coast, Australia. The opening ceremony timed to coincide with the second annual Steve Irwin Day celebration realised Steve Irwin's dream to establish the world's largest wildlife hospital to honour his mother Lyn Irwin who had been a pioneer in wildlife care in Queesnalnd, Australia. The new hospital is also a living memorial to Steve Irwin. (Photo by Lisa Maree Williams/Getty Images) *** Local Caption *** Bindi Irwin;Terri Irwin;Robert Irwin (Photo by Lisa Maree Williams/Getty Images AsiaPac)