What lays blue eggs? I got chicken eggs from a guy and he put in some extra eggs. 2 are coturnix and 2 are Blue. They blue are the same size as the coturnix eggs.
Could be a Robin those have blue eggs they are light blue you can see them at this website. http://www.paulnoll.com/Oregon/Birds/Home/bird-feeder-Robin-eggs.html
Coturnix Can Lay Eggs Tinted In Blue, Green Or Even Purple With Or Without The Mottled Spots On Them. Its Not Common And Only Happens "every Once In A While.."