I don't know man, but I approached a big one perched on a branch and it took off a few feet from my head. This was just a few months ago. This thing had a wider wing span than me. HUGE. I didn't know what it was on the branch until it's head did a 180. It was so silent, my dog didn't even see it. I don't know what kind of owl it was. We got a crop of field mice for them to munch, but this thing would need a schitzu or pomeranian to fill it's tummy. When the owls are hooting, nothing else makes a noise.