Ameraucana hens can lay blue-colored eggs.
The Ameraucana is an American breed; in fact, its name is a portmanteau of “American” and “Araucana.” It is thus a descendant of the Araucana, which has two lethal genes, one for taillessness and another for tufted ears.
If a chick inherits either gene from both parents, it will die before hatching.
Source: cs-tf.com
