She looks like my Black Australorp did after her first experience with yogurt. Sorry, I know that doesn't help much, but it was the first thing that popped into my head. She is a cool looking bird!
Green legs, flattish comb to me indicates possible EE pullet since they do tend to come in lots of colors & odd flat/but not quite flat comb combinations. I also have Australorps and she has that heavier Australorp look but of course the comb is different. I've never seen BAs with white mixed in, so possible cross? I don't have a clue one way or another about Wyandottes.
I had no idea I was going to create such controversy. Particular thanks to Chris09 for such a pleasant response. If you don't agree, I'd appreciate it if you'd just state your opinion rather than making a comment about me. I'm always happy to learn.