perching

should I be worried about Buck perching on one leg? He's been doing it almost everyday for a couple days now. Hes eating and drinking and playinh like fhe usual. He perches like that in his cage at the end of the day or in the morning while he is on my shoulder. Is this just normal behaviour of...

I've been a budgie owner for a few years now, and it just occurred to me that I've never seen any of them rest on one foot, only two. Is this normal?