Last night, about 10:00 PM, we heard the distinctive 'Hoo-Hoo' of the local horned owls. We turned out the lights and looked out the window just in time to see one silently swoop down from over our house, make a couple of graceful turns and land at the top of a pine tree behind our house. Just as he (or she?) landed a second owl fluttered up out of the same tree and flew off and out of sight. Their wing spans are wide in proportion to their relatively small bodies. We watched the 1st owl sit in the tree, silhouetted by the lights of the neighborhoods by the bay, for several minutes before he took wing and silently flew off into the night sky.
It's amazing how silent and graceful these critters are. The true stealth fliers.