One of my two full grown drakes was killed right outside the coop. My female and other drake are ok. The duck was on its back with feathers all around it and the front was eaten clean down to the bone. From about the breast down. Also found possibly the live beside the carcass. I am thinking hawk but no idea. They are in a 25x25 welded wire fence wnclosure with 2x4 openings and its 4 feet high. No evidence of anything going under the fence. The duck house 4x8 is also there but about 2feet from the fence. This happened about 6 pm or perhaps a little before. There are eggs in the house and they weren't touched. Have a woods behind the house . I live in south central Pennsylvania. So was still full daylight out. Help me identify the predator so it can be removed.