Colored Egg Layer. These birds are excellent layers and produce eggs that range from olive green to turquise blue. This hardy breed was developed in the U.S. in the 1970's using Araucana birds from South America. Like their eggs, they come in as assortment of colors. They are favored for their eggs, but are large enough to be used for meat. Average mature weight: roosters 5 lbs, hens 4 lbs.