They are game birds, truthfully I didn't know much about them until I found this thread and looked more into them and their eggs. If I happen to stumble on some here or another page I will let you know
I also found this on my Ventures of looking into the birds...
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...