Looks like a girl to me. I don't see any streamers in the crest, or the boy hackle feathers. How old is it?
Here is ours that I thought was female for a long time. I know it's not the best picture but see those darker longer feathers in the crest? Those are the streamers. That's when I first started thinking he may be a boy. Also notice the difference in the hackle between mine and yours.