Here is an interesting article from Answers in Genesis about whether the –
Peacock Tail Feathers Don’t Drag Them Down
Dr. Elizabeth Mitchell on October 2, 2014
The article is somewhat technical, but very interesting.
I like her closing thoughts, “God created all kinds of animals, plants, and the first two human beings in the space of just six days, about 6,000 years ago. They have for about 6,000 years varied and reproduced only within their created kinds, as we infer from Genesis chapter one He designed them to do. Protolife-to-peacock evolution cannot explain the beauty of the peacock’s feathers or its aerodynamic qualities, but what we read in the history book of all life—God’s Word—explains what we see in God’s world.
Of course we still don’t know why God designed such an over-the-top artistic wonder as the peacock. Perhaps He simply wanted His people to know that He is not only a great engineer but also to demonstrate that the Creator Himself appreciates beauty and wants us to do the same, admiring the handiwork of our God.”
Gavest thou the goodly wings unto the peacocks? or wings and feathers unto the ostrich? (Job 39:13 KJV)