I've recently discovered my birds want the "mood" set for baths. I set them out a big bunch of parsley, cool from the fridge & wet from a quick rinse in the sink.
In less than a minute I had 3 birds "bathing" on it and having a ball. So I pitched in with a spray bottle. For the first time they didn't mind. Some actually positioned themselves as close to me as they could get. Would turn one side, then the other, then the tail. So they got nicely wet all over. As one bird decided it was done another would move in to take its place.
In the end even the birds that normally hated being sprayed were more than happy to rub around on the parsley & get misted. I've tried it since with other greens & they seem to prefer the parsley the best. Going to try celery tops next.