That's fascinating! But sad for the baby.

Once a falcon swooped at "my" flock while I was watching them feed. They dove quickly enough in the water and stayed safe. But after that I was more careful about where and when I fed them. Would *hate* to see one be snatched in front of my eyes!
Fortunately the predating hawks have pretty much been cleared from the duck pond area, as the local birds have mobbed them several times. They haven't come back since then - off to find an easier territory.
The crows and mallards have a symbiotic relationship. They watch for the hawks, and will sound a warning. The mallards are constantly listening and jump in the water even when a blue jay screams! The crows will also form a mob with their calls, and will join in with other birds to chase the hawks away.
I started putting peanuts out for the crows, to reward them for their friendship.

They will often come down and feed alongside the ducks.