I posted the information that Yashar has about Colloncas on a State thread and someone posted:
 
Thank you for this information, but I believe these are just more descendants of the ancestors of both the Araucanas and the Ameraucanas - and our Easter Egger (Americanas) from the feed store. 
 
I did extensive research before buying my true Ameraucanas and I do not believe these Colloncas are an ancient breed which was kept by Indians any more than the first Araucanas (tufted and rumpess) imported into the US were an ancient breed - although they were also originally claimed as such.  It was later discovered that it was a created bird bred by ONE breeder in Chile and he called them Araucanas.   He chose only rumpless, blue egg laying and tufted birds from the land race available around him and selectively bred just those birds to create it.  The word Collonca means no tail in Chile, and any bird that had no tail was called a collonca.  A fellow over there said our Easter Eggers from the hatcheries are closer to pure descendants of the original land race kept by the Indians (note - not a breed - a land race) than the birds they are breeding in Chile now.  Apparently some over there have selected and created a breed of only rumpless birds, mixing in other modern breeds to get what they wanted and they call them Colloncas,  but I believe they stretch the truth quite a bit to claim it is "one of the original breeds".
 
The idea of keeping more than one rooster is a very good one - because the rumplesness of the boys leads to low fertility rates.  I think the tail helps in "aiming" so you would need more than one rooster to fertilize the flock.  The Araucana breeders have discovered this, and some keep tailed birds with their flocks to help with this problem.  This is another reason I believe this breed is created - it would not survive in the wild.  Natural selection because of low fertility rate in the rumpless boys and higher fertility rate in those with tails has removed rumplessness in our Easter Eggers, and to keep the rumplessness you would have to selectively breed for it.
 
Pretty birds, but I think I will stick with my Easter Eggers, no fertility problems there!
 
I do not know how to reply to a post like this except to say post like this is why I do not read the Ameraucana threads....