Wahyu Romdhoni, aka Weer, is a young artist from Indonesia. Despite his young age, he already has his own style. His vector illustrations of animals are incredibly colorful and dynamic. See more works on his DeviantArt and Shadowness.
The texture of this image is great. When we see peacock feathers, we never truly get to see a close enough shot to reveal the texture. I also like the rainbow effect because I feel that each color has many different shades within this multi-color feather.