They call Araucanas, Collancas in most references. It is believed that the original collancas which were tailless were possibly bred to another chicken that had tufts to create the modern Araucana back around the time of Columbus but there are no real records that collaborate this. But Araucana are recognized by both names. Don't confuse Araucana with Ameraucana or Easter eggers either cause they are nothing alike. Don't count on information from anything other than the APA or University based information being correct. I guarantee you no general hatchery sells true Araucanas. I see people on Ebay selling araucana eggs which are obviously not cause they have beards and tails. Unfortunately BYC can be the worst about false information if you are doing research. Too many people who have heard or read some false information and post it as gospel. One clue is to check the spelling. If someone is spelling Araucana like you did in the above post, chances are they are a mixed breed.
Not all araucana are tufted either. In fact two tufted birds create a deadly gene which will kill at least 25% of the chicks.
My Araucana stock actually came from three different U.S. show breeders so they are most likely up to standard. The bird from
@Sharol came from my hatching eggs.
Araucanas are rumpless. They are missing the last three vertebrae on their spine that a normal chicken would have. Rarely a tail will grow but that bird would have genes from European blood rather than U.S. or South American blood. Which is highly possible since many show breeders import birds to add particular characteristics to their birds. But it isn't an accepted standard for American birds. I have never had one with a tail but I think Sharol hatched one from my eggs that did have.
At any rate you get nice blue eggs from them. And their quirky looks and funny little personalities.