Blue
they are black. ducks are so cute!
Yes.
from an egg
Yes they are. They are needed to fertilise the egg.
1
egg, then duck
a duck egg is bigger quails eggs are very small.
color changing ducks actually don't exist, you're just on LSD
No, the eggs are not viable until fertilization. So, like chickens, the goose will lay an egg whether fertile or not. Now, if you want to RAISE ducks from hatchlings, then yes, you want your ducks to mate regularly so as to ensure success in fertilizing.
White
Scientists know that many ducks show a preference for the color green or colors closest to that spectrum.
No. Ducks are birds and the Platypus is a monotreme which is an egg-laying mammal.