Wondering about ducks?

Ok i always had a couple of ducks come to my house... 2day they were walking around my house and all of a sudden the female duck started quaking so loud when we ran outside to c wat happened all i saw was the female ducking standing around and no male... any idea wat might have happened??? can the duck leave the female??? i feel so sad 4 her she walks around and calls him and he is not comin ... will she find another male???