Bullsbrook is a suburb on the outer Perth metropolitan area. It is located with the City of Swan. The original Bullsbrook townsite is located slightly west of the current town, on the 17km mark of the Midland Railway. Bullsbrook is also the home to the RAAF Pearce airbase, a major training facility for the Royal Australian Air Force. Perth is the capital city of Western Australia. ... The RAAF Roundel is based on that of the British Royal Air Force, with the central circle replaced by a Kangaroo, a symbol of Australia. ...