The current state flag of South Australia, was officially adopted by the government of South Australia in 1904.
The state badge
The flag is based on the defaced British Blue Ensign with the state badge located in the fly. The badge is a gold disc featuring a Piping Shrike with its wings outstretched. The badge is believed to have been originally designed by Robert Craig, a teacher at the School of Arts in Adelaide, and officially gazetted on 14 January 1904.