At 9:15PM I was in Moore Park Ravine downstream from the Heath St. pedestrian bridge near where Mud creek crosses from the west to the east side of the trail and there were some Robins making a lot of noise and swooping through the trees at high speed. They appeared to be upset by some Screech Owls in the area and they were dive bombing them.They are the first Screech Owls I have encountered this year.