White crested black polish: Male or Female

[z0nnn]

First time poster here. My girlfriend and I have 9 chickens: 7 mixed layer breeds and two polish. Our white crested black polish is about 12 to 13 weeks. She has started at the time to start to crow. Very much sounds like a cockadoodledoo. She is with all females and I know that the females can start to crow in that situation. We are having difficulty sexing her as we are first time owners of polish. See attached a picture of her when she was a chick and a few others are from today and one from a few weeks ago. Any help would be appreciated.

 

[nuthatched]

That's a cockerel, a dude. Polishes have a trick, males have 80's rocker hair, females have round 60's bouffant.
Female Birds that young also don't have big red wattles.

 

[Little Baby Bean]

Definitely a cockerel.

 

[fluffycrow]

Cockerel

 

[z0nnn]

Thank you everyone for your responses!