"Quack", they said

This well-known kind of duck is called the "Mallard" duck, that lives in America, Asia and Europe and has been introduced to New Zealand and Australia. Just as the peacocks, only the male is good-looking. For example, the male (which is called drake) has a glossy green head and grey wings and belly, while the female only has brown and black feathers... Isn't that unfair? Also, the males sometimes have more that one colours on their wings' feathers that make them look even more beautiful..
Here are some pictures of them: