Wild ducks and Call ducks can fly. That is because they are not heavy and they are also small. There may be more domestic ducks that can fly besides Call ducks. If you want a duck that can fly clip its wings. Bye!
Not normally.The harrier is a bird of grasslands and meadows.It usually feeds on rodents and small birds.But as most predators,it is a creature of chance,and would not turn down an injured duck if the opportunity was there.Ducks fly much too fast to be taken on the wing for a harrier.