What kind of chicken is this?

[drumstick diva]

Dark Cornish

 

[chicken hawk 33]

Mine has grenish olive colored legs

 

[Michael OShay]

Araucana are rumpless, meaning they are missing a few vertebrae that form the rump. Your's looks like she's just molting her tail feathers. They also do not have muffs, ever. Araucana have tufts, which is an entirely different facial feathering.
Ameraucana do have muffs, but only come in a few colors, and always have white skin with a 'slate' wash on their legs. Your's has yellowish legs, and isn't one of the recognized color varieties for Ameraucana.
Easter Eggers usually resemble Ameraucana, but don't meet the requirements for the breed.

X2 on junebuggenas post; hatcheries and feed stores frequently and incorrectly market their Easter Eggers as either Araucanas or Ameraucanas (both of which are true breeds) even though they are hybrids bred by crossing blue egg layers with brown egg layers to produce offspring that lay eggs in different colors. There is a good article at http://www.the-chicken-chick.com/2011/09/ameraucana-easter-egger-or-araucana.html explaining the different between true Araucanas, true Ameraucanas, and Easter Eggers.

 

[Michael OShay]

Mine has grenish olive colored legs

Greenish is the most common color with Easter Egger legs.

 

[BantamLover21]

My daughter ordered a variety of chickens but doesn't know what they are. Three of them I'm pretty sure what they are and maybe the fourth. But this one has me curious. She doesn't really have a comb or a waddle. She is unique compared to the other four. Here's a couple of pictures. I would appreciate the help.

Dark Cornish.