I had white owls in my attic when I first moved here. They were here several years and finally left when I had the roof replaced. I guess they didn't like all that racket!
On a few occasions on excursions to the attic I heard sounds, like steam escaping. It was the owls protesting that I was getting too close to their nests. The babies were huge and hairless--not cute at all, except maybe to Mom owl. When the owls were learning to fly, their favorite thing to do was to buzz my dogs, and then shriek, shriek as they flew away.
http://www.outdooralabama.com/...
Oh yeah. The reason I posted this. Owls are one of the predators of bats.