I'll try to capture some images of this if I can... my budgie has confusing behavior today.
He seems very irritated. I've let him out to get his energy out, & he did (flew around a bit) but then went to his play gym and just squawked. He can go back to his cage on his own... I thought he would tire himself out with the squawking and then relax, but he kept it up. It's pretty shrill.
So I went over to give him some attention. He was holding his wings out a little bit...(like he was warm, but he's not.. that kind of move)... and then he would also lift both of his wings straight up behind his back.
I read this... "sometimes budgies use this method when courting a female (budgie courtship behavior) or when they want to impress an opponent."
I can't figure out if he was displaying courtship behaviors or saw me as the opponent.
Or, maybe he's just frustrated about something. I haven't given him his kale yet today and maybe he's mad about that.
I put him back in his cage and he seems to have mellowed out a bit and is playing with his toys. Although he's flapping his wings a bit like he wants to come out ... but when he was out he didn't seem happy about that either.
Could just be a lot of hormones....?
*Update... perhaps it was boredom. I let him out, put on some classical music and now he's on one leg chirping nicely with the music.