You want to see a parrot get mad?

Cut her toenails.

But, you want to make a parrot see reason?

Let her try to fly away from the nail clipper and watch her end up hanging from the arm of your sweater - by her toenail.

After that, she glared at me but good, but she sat (relatively) still while I did the clipping. She periodically attacked the clippers of course, but that's allowed.