Owls are built for silent flight. I would base the answer off of that.
It depends on the type of owl but generaly an owl can hear a mouse from about 23 meters
The horned owl can fly a short distance when theyre in the night
Well, it depends on if the owl hears the prey. If the owl does hear the prey then it will fly towards it, and try to attack it. So, I wouldn't really say that kill their prey instantly.
Yes.
NO
So that the prey do not hear the owl coming.
An ostrich can not fly
The great grey owlet can fly when the owl has fledged, or grown its flight feathers. It then tries many times to fly out of the tree it is living in, and then fly back.
40mph
yes
when you shut up
No Owl can here from this distance