The average color is
yellow , brown , white , and green.
There is no single answer to that as there are many breeds of duck, so the males and females in different species are different colours.
They are yellow
color changing ducks actually don't exist, you're just on LSD
Blue
White
A lot
because you touch yourself at night...
Nope.
they are black. ducks are so cute!
blue
Ducks and Mushrooms/Carrots
They can be whatever color you want to be if you have some paint.
Same as the male, orange.
Yes, there are several ducks who will eat mosquito larvae. Muscovy ducks are said to be the main predator for mosquito larvae and are essential for keeping the mosquito population at bay.