I've been trying to work with my budgie on getting him to lay in my hand on his back without me holding him with my second hand. I've seen it done before in videos. People called it playing dead on their hand. I lay him on his back in one hand and I'm kind of holding his feet with the other, his feet are perching around my finger. He doesn't mind this. The problem is, he doesn't like when I let go of his feet. He keeps trying to hold his grip on my finger. He's very scared of me letting go.
It seems easier to teach a bigger bird to let go of fingers because you need multiple fingers to hold their feet and you let slowly go of one finger at a time during the long process. Duke only grips onto one of my fingers, basically. Maybe he won't ever let me hold him like that?