Early head bobbing sex id?

Recently my year and half old emys emys (about 6" length) started head bobbing when seeing unfamiliar objects or when in unfamiliar territory. Its definitely head bobbing not breathing or sniffing.
I was wondering if head bobbing at this very young age in any way identifies their sex. Both female and male head bob as adults, I was wondering perhaps one sex starts this behavior at much earlier age then the other??

I'm not able to speak on it but I think it's an interesting subject. I used to raise southern painted turtles as a youngster and I noticed that even my hatchlings that were incubated as males would head bob one another even at one month of age, whereas the ones incubated for females wouldn't head bob at all. Of course it's a completely different species in every respect but it was still very interesting at the time.

In the Redfoot world *BOTH* females and males will display head bobbing when sexual maturity is met.

I've seen female RUSSIANS head bob at other tortoises before m