Okay I looked for the purple eggs and found a bird called tinamou's lay a wide variety of colors one being purple, the eggs I've seen on Google look almost fake.
http://en.wikipedia.org/wiki/Tinamou
http://www.pittsburghlive.com/x/pit...5028.html?TB_iframe=true&height=460&width=720
http://en.wikipedia.org/wiki/Tinamou
http://www.pittsburghlive.com/x/pit...5028.html?TB_iframe=true&height=460&width=720