For over 2 weeks I have had nightly visits from 1 to 3 large owls (still don't know if Barred or GHO... suspect GHO). The flock has been on shortened free range from 11am-5pm and I have lost no one (including 15 3week old babies)! Still don't want to become permanent home to these owls! Last night I had an idea! We have a pair of large yard lights on the house and I decided to leave them on all night to see if it would deter the owls. Lights on all night and never a "Whoo" or a "Hoot" all night... first night in weeks! Did the light deter them? or just a fluke? Anyone have any thoughts?