This is a good example of RHYTHM because the feathers on the peacock are all in unity, but if you were to continue the painting, you would not know exactly what they new ones would look like since they are all a little bit different.
How to Draw A Peacock Feather, free printable Worksheet (How to Draw Worksheets for Young Artist)
This is gorgeous. I really love this messy effect that you can have with watercolor and it looks great... I also really like it that with watercolor your drawing sometimes feels out of bounds or like it has no boundaries at all.