Bats fly by grabbing the air in their their sensitive webbed fingers, feeling little eddies of air, they adjust instantaneously deftly, teasing their way through air currents.
I'm certain birds have a similar sense of the air, but there is something more relatable and easier to imagine about being the bat, using great webbed hands to surf & climb air columns.
We haven't even gotten to the part about the radar yet!
If I could spend a day as a creature it'd be an ant, but 2nd choice is a bat.