It is common knowledge that many animals have bright feathers, shiny skin, or colorful fur, and usually only males possess such traits. According to researchers, evolution has made male animals brightly colored because of mate selection.

A prime example of such coloring would be the Peacock. The male peacock uses his colorful feathers to attract mates, whereas the female peafowl remains mostly brown. The same is true for similar animals, such as mandarin ducks, which have male ducks possessing brightly-colored feathers.

This phenomenon has been explained by a process known as sexual selection when females tend to choose partners depending on physical characteristics. As a result, the color of males changes from generation to generation, becoming ever brighter, while the females require camouflage to protect themselves and their offspring.

Nevertheless, in some cases, males and females of a particular species can be equally bright, or females may have brighter colors instead of males.