They are scavengers big time. I live next to a big lake here and they are always picking up dead fish and working road kills. Very cool to watch, they have been nesting here for close to a month now.
Had an adult at my big woods the other day looking over the ponds it didn't seem to bother the ducks&geese at all...I would rather it moved along though they are hard on bunnies and young turkeys.
I've had them come in while calling yotes and turkeys many times.