As someone who raises Araucanas, albeit new to it, if you got them from a farm store and not a breeder, they are not araucanas. That is pretty much the rule of thumb through the community. They could be Americaunas, or easter eggers, and they are super adorable either way!!!!!!! Beautiful chicks you have there.
If you'd like me to give my best judgement on if they are Araucanas, take some pictures of their backs, specifically their tail area. You can tell yourself by feeling for a tail bone, even. Much easier for you to tell than me trying to distinguish a tail in a picture, I'm not even sure I could do it, but I could try. Araucanas are rumpless, so that little nub won't be there.
I'm not an Araucana expert. I can only repeat what I've been told from fellow breeders, as my journey with the breed only started last spring. But I'd longed to get them for a few years and have read a lot, and can at least share my own personal views. I hope to be an Araucana expert in years to come though. Just call me an aspiring one? :D
(Please don't yell at me, more experienced araucana peeps!!!!)
edit: on looking closer at the pictures, the 5th one down looks rumpless to my eyes. Is that one? It's possible you do have araucanas! May I ask where you purchased them?
Edited by Clearly - 2/29/16 at 9:25pm