This one has only this hole. Doesn't look like bones have been damaged, but I wasn't poking around in there. No other wounds that can be seen without dissection. Second bird This is the same one as above Third Bird Fourth bird has no visible injuries. It looks like the hearts have been the target for whatever predator caused this. We've been having issues with the bear, it has destroyed bird feeders and recently demolished my feed crate that I had my duck feed locked in. However, we also have coyotes around too. We live in town, in a neighborhood, and it's rather odd to think of bears and crap in our area, but they're here. The scary thing is the fact that these birds were scattered in my yard, front yard and back yard. Whatever was after them wasn't starving, or it'd have eaten more than just the hearts out of these birds, and certainly wouldn't let a whole bird lay. I've had these ducks for just under a year (May of last year), and have never had a problem until now, besides the duck food. What worries me is the fact that the predator(s) must be quite bold, to com e between two houses, right next to a street and kill one of the ducks, and stick around in our yard long enough to kill four ducks. There are street lights, and our entire property is lighted by these street lights (we even have one in the back yard). So... Any ideas on what this menace is? I'm thinking that my next investment will be a shotgun? I can't use the 30-06 so close to buildings (can't really use a shotgun either, but our neighbors have used them for groundhogs, and wouldn't have a problem with me killing off something that is potentially dangerous.