How to Sleep Upside Down Like a Bat

I've had birds for the last 15 years. Never seen a budgie sleep upside down like a bat. It's an unusual behaviour, but nobody that you know has seen this before. I'm thinking because the blood would run to the head because he's upside down so much. Yeah, and it can be a bosom. Look, I think we need an ornithologist, a biologist to ring in. Dr Lucy: Let's give the audience a little magic number that people can text in their answers - 1-800-273-8255.