At what age do BP's gender become visibly noticeable?

Never! No matter what anyone tells you, there is no way to physically differentiate male or female in ball pythons. You must pop or probe. Palpitation can be used and it is common for boas, but it has not been studied with ball pythons and is not accurate.

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Originally Posted by RobNJ

I'm going to go against the grain here and say that there is an age/size where balls will start to differentiate by sex.

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I agree, that is against the grain. :tongue2:

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Originally Posted by evan385

Never! No matter what anyone tells you, there is no way to physically differentiate male or female in ball pythons.

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I'm not saying it's a practice that should be adopted as fool proof...all I'm saying is that it is entirely possible. Males generally have a much lighter build, and their tales are generally longer and not as sharply tapered. I do believe that in adult bp's, it's possible to visually differentiate between males and females with a good degree of accuracy. Is it something I think people should rely on? Not at all.

Sure you can guess that your BP is small so it must be a male right? Wrong. they all grow at their own rate and will have their own final size. You might get it right but it's still a 50-50 shot. same chances as you have if you pulled it out of a hat

I'm not sure you'll ever know a true sex untill she lays...lol.. I have a 2000+gr fe-male that i'vehad popped three times and probed thress different times and been told many times of different sex... Kinda irratating....lol.. But as far as visual signs i'm p1etty sure.there are no visual signs, sorry