You can't actually say that it's "a huge outlier", simply because it's the only small bird for which we have such data. There was never any reason to think swi

You can't actually say that it's "a huge outlier", simply because it's the only small bird for which we have such data. There was never any reason to think swifts had sleeping patterns anywhere close to those of albatrosses, condors or storks. Albatrosses, condors and storks also all have vastly different behaviours and live in completely different environments.