How well does this work? Let's put it this way: An owl can hear a mouse stepping on a twig from 75 feet away. Owls also have an incredible sense of sound elevation, meaning they can detect the height from which sound is emanating, because one ear hole is placed higher than the other. All of this is to pinpoint the exact location of the owl's prey, which in fact works so well that the bird can make in-flight course corrections to strike at its victim.
And keep in mind, we're talking about a nocturnal hunter -- they're using this finely tuned sense of hearing to take down prey that the owl can't even see. So, basically we're looking at a flying Daredevil but with a slew of built-in razor blades on its hands a la Wolverine.
To demonstrate how these powers would be handy fighting crime, we'd like to show you the following video. imagine that the lemming is crime:
To make matters even worse for the criminal element, owls also happen to have special serrated feathers that allow them to fly silently like a stealth fighter. Furthermore, they have the lowest wing-loading ratio of any bird, meaning they can fly extremely slow if they need to, or carry large loads. The owl superhero wouldn't need to zoom in like Superman or swing around like Spider-Man -- he'd just slowly, silently glide over the area, hearing everything and casting an ominous shadow in the night sky. Hell, he'd be his own Bat Signal, if the Bat Signal could swoop in at evildoers and carry them away.
Oh, and if you're now inspired to become an owl-themed superhero based on all this, there is one genus of owl that has already come up with a kick-ass name for you: Strix.
Via Wikimedia Commons
And it can see into your soul.