The Sulphur-crested Cockatoo (Cacatua galerita) is white with a yellow crest. This one was one of a number today scrounging food from the outdoor eating section of a cafe in Lorne, south coast of Victoria. All of them were very dirty, having obviously found something mucky to immerse themselves in! Just along the road, around 50 metres away, the cockatoos there were pristine.
Click on the image below to view on iNaturalist.org.