I lost two rouen ducks last week. I let my ducks free range on our property. I came home from work and 2 of the three were dead. the only wounds I could find were to their backs - very little blood and no gore. If I hadnt looked, I wouldnt have been able to find any injury. Do avian predators strike during daylight and if so, what would go after 2 large ducks?? I dont think it was a fox or coyote b/c we have a dog and a donkey and they keep all the chickens and ducks safe - as long as they stay in the fenced property.