Determining if my (Australorp) chicken is M or F?

[ktunicorn]

This chicken is just over 18 weeks old, and Im trying to determine if it is a rooster or not. Its a black australorp and definitely has the most prominent comb out of all of them. Ive also seen it false crow a couple of times, but never actually crow. Its a little more protective of the other chickens, but not overly so. So i am a bit unsure on if this chick is a rooster or not. I have a feeling it is, but its my fiances favorite chicken so I am hesitant to make a firm decision about it until im 100% sure.

 

[Painted Calls]

Pullet nearing POL.

 

[RainbowHen]

That is a beautiful girl. Expect eggs soon

 

[TheOddOneOut]

GIRL.

 

[Sally PB]

Looks like mine did at that age. I started getting eggs a week later.

 

[Acre4Me]

Looks female with an unexpectedly long tail feather. But, BA male would have a larger comb by 18 weeks, along with obvious saddle feathers.