I've been curious for a long time about a behavior that one of my cockatiels does on a daily basis. Sitting on one of his perches or on a "ledge" of some sort (including human shoulders!), he will bend forward, sometimes to the point of being completely upside-down, and spread his wings. He'll hold the pose, wings wide open, for several seconds before sitting upright again. He seems to do it more often at night before bedtime for some reason, though he does it multiple times over the course of a typical day. Now about 2 years old, he does it now more often than ever before. I think it's very cute, but I have no idea what it means.
I'm not concerned since he seems perfectly content when he is in the mood to "hang"; I'm just curious if there is any explanation for this. Interestingly, though my other cockatiel halfway mimics this behavior every once in a while, he doesn't ever do it spontaneously.
Thanks for any insights you have into this behavior.