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araucana- true, tufted and rumpless(required to be shown), but they sometimes have tails because many breeders use them because there is lower fertility associated with the rumpless gene and the tufted x tufted has high chick mortality in shell. Araucana lay a blue egg.
ameraucana- do have muffs, beards and tails. They *should* lay a blue egg, but in some of the newer colors they seem to have a green tint sometimes. They NEVER lay a pink egg, EE's lay pink eggs.
EE's are sold by hatcheries as ameraucana, araucana, americana, etc but are mixed breeds that usually carry the blue gene but don't always.
if you go to the araucana and the ameraucana websites they will tell you the accepted colors. EE's come in a variety of colors and there is no set standard.