Lately I had a debate with a person on internet on whether beauty of Wood Duck has any relation to Evolution or not.
At first he claimed that Evolution has nothing to do with beauty of species, and only narrow-minded people would assert that. However I refuted his comment by giving example of peacock: (The peacocks with well-formed and beautiful tail have higher chance to reproduce and pass their genes while rest of peacocks more probably lose the chance).
Finally he took a step back and claimed Wood Duck has nothing to do with evolution as it's beauty does not serve Wood Duck's survival in any way or form, hence this beauty must be caused by god, not the evolution.
My question for you is this:
Why Wood Duck is so beautiful? Does its beauty has any survival benefit to it? If yes, please elaborate how.
Note: By Wood Duck, I mean the following bird:
Thank you very much.