Our local Sharp- Shinned Hawks have been daily visitors at our bird feeder. They are picking off innocent sparrows daily. It's a circus out there. Sparrows smash against our windows trying to escape. That's why Mrs. BD terms it a Sharpie-feeder. That's fine me with me because I am a carnivore too, and I like meat rare.
And each morning around 3 AM I hear our neighborhood hoot-owl - a Great Horned - establishing a nesting territory. They have already mated, will lay their eggs in January in the snow and frigid weather in an old crow's nest. That's how they roll, and it works.