Yes they would. You should not feed wild ducks, they will become dependent on you feeding them and they will die when you stop, because they will lose the ability to find food themselves. If you continue to feed them anyway, do NOT feed them bread, it is extremely bad for them. Bread fills them up but gives them no nutrients, and they will die from malnutrition. Also if too much bread is given to them they can sink and drown.
No.
If the result you want is a mallard, yes. If mallards can just breed with other ducks, yes, a mallard duck can breed other breed ducks.
Mallard ducks are not capable of changing gender. There is no known species of duck that is capable of that.
Mallard ducks were never introduced. Mallards were the first duck ever on planet Earth.
Yes, and the offspring would be a a sterile F1 hybrid called a Mulard or Moulard.See the related Link listed below for more information:
The usual. South for the Winter . Stay in wetland areas in the Temperate Zones.
from an egg
Yes.
yes they do
Foxes, and raccoons eat young mallard ducks. Snapping turtles will also eat them. Mallard duck eggs are eaten by snakes, and crows.
A box of quackers
Yes, South Carolina has mallard ducks. These ducks can be found in almost any area with mild temperatures across Asia, Europe, and America.