Peacock eye Boule

http://www.webexhibits.org/causesofcolor/15C.html

Peacocks – the eyes of a peacock are of particular interest to Serres in The Five Senses

http://www.theidproject.org/blog/lawrence-grecco/2012/05/28/lessons-peacock-how-transform-poison-beauty

http://www.hominf.org/peacock/peaintr.htm

http://onlinelibrary.wiley.com.plymouth.idm.oclc.org/doi/10.1111/j.1094-348X.2008.00203_3.x/full