Aussie Bittern over Altona, VIC

Hi folks, I was just out in the backyard and glanced upwards and was surprised to see an Australasian Bittern flying over me. I live in Altona, Victoria, close to Truganina Swamp. The bittern circled and gained height then flew off to the south, then seemed to turn east. I bet it will be touching down at Kororoit creek somewhere close to the ford. Any birders in that area keep an eye out this evening. Time it flew over my yard was 17:40 hrs. Dave Richardson