Sequatchie County 9-5-05 While photographing Flying Squirrels feasting on sunflower seed at my feeder about 06:15 this morning, I heard a Great Horned Owl calling. Heard only one bird calling. It has been my experience that Great Horns will call when the weather turns cool. I've heard them calling on cool nights in August in previous years. The temperature was a pleasant 61 degrees. Clyde Blum Signal Mountain, TN (Near Chattanooga)