Actually, TRUE Ameraucaunas are supposed to lay blue eggs and throw offsprings that lay blue eggs.....
http://ameraucanabreedersclub.org/history.html
The trouble is that most birds sold through hatcheries as 'Ameraucaunas' are actually EEs, not true Ameraucaunas, so you get blue and green eggs from them. Ameraucaunas don't have the gene for brown, hence only get blue eggs, of varying depth of blue.
