The Ameraucana was developed in the United States in the 1970s and was recognized by the APA in 1984. Ameraucanas are one of the few breeds that lay beautiful blue eggs and are the parent gene of many Easter Eggers. The blue egg gene that chickens have also includes a gene lethal to baby chicks. The Ameraucana was bred to retain the blue egg gene but eliminate the lethal gene. Ameraucanas are good-natured, medium-sized birds that tend to take confinement well. They also do well in cold, though not as well in heat. They are quite stylish, with fluffy earmuffs and beards as well as a pea comb.