I'm not sure what's wrong with him. There's no physical injury that I can find, but he's a little thin without being too thin. He was found sitting on the road and being cranky about it, then he was caught and shoved in a box, which improved his crankyness not at all. Now he is in the new cage and hating every minute of it. If I ever needed a poster-child for cranky, I'd use this kookaburra. I am almost tempted to say "Crikey! He's a bit stroppy!"
Tomorrow I'll take him out to H's. She has released the goshawk and will move the eagle into the large aviary, so that will leave her 3m x 3m cage free. I'm sure that will NOT impress the kookaburra but it will give him room to stretch.