Would you want to 'see' which way is up? There's nothing to see pre 100 years ago. And with human things unless the bird is actually centimetres away there is

Would you want to 'see' which way is up? There's nothing to see pre 100 years ago. And with human things unless the bird is actually centimetres away there is also nothing they could see given the resolution they could perceive. Literally there is only a direction. And they don't even have a north or south direction, if swapped they can't tell. So it's less of a sense than up/down.