our bird's body-language has a lot of subtle feather-movements I'm not sure other birds could see at a distance, and they apparently see uv. I also think he hears either ultrasound or just really well, because I've been wheezing slightly while breathing and a few days ago he started squeaking at night once each time I breathed.
he sleeps across a room and then down some stairs from me.
bird eye fun fact: birds have a comb-like structure in side their eyeballs. instead of having blood-vessels on the retina, they release nutrients into their eye-goop and then the retina absorbs them from there. this apparently results in clearer vision.