That's interesting, Dread; I've never hatched a single in any of my olive eggers, only peas thus far.
What color Ameraucana did you use?
ETA: the upper left-hand egg in my avatar is another of my F1 olive egger eggs; a bit greener than some I've seen; I've been wondering what a "true blue" Ameraucana egg crossed would look like, yours seem to be a bit lighter green than my F1, but I would think crossed back to a Marans roo, the resultant pullets would lay a more olive green egg, whereas mine pictured above is a golden-brown-green. Yours should be very pretty, I would think!