aracauna or americauna?

[Flock Runner]

sorry if i spelled them wrong but i don't really care. i just wanted to know if there's any difference between aracaunas and americaunas and what that is if there is one.
thanks!

 

[Ridgerunner]

Check this out. It is about as clear as anything I've seen.

EE/Ameraucana/Araucana comparison
http://apa-abayouthpoultryclub.org/Edu_Material/Easter Eggers vs.pdf