Those cockatoos don't allow anything prettier than them to survive.
I guess you should be glad the experts think they're native, because if not, "experts" can do some very strange things. In California, they cut down every eucalyptus tree in a park because they weren't native. I believe Jack London had brought them over from Australia and planted them. It's very shocking to go to a park, and thousands of trees are cut down. I never went back, don't know if native trees started to grow.
Anyone else have wildflower pictures?