[Peter B]

Hi,

I have a question for the specialists: I know that you can see the difference in sex of Uroplatus phantasticus at their tails but at what age is that? Does the form/ edge of the tail change when growing up or can you sex them at birth?
Thanks a lot for your help.

[Stijn]

Hello Peter,

you can have a good guess as soon as they are born, the shape of the tail doesn't change that much when growing up.

regards,

Stijn

[miguel camacho!]

The shape of the tail is not a reliable indicator of sex, although a notched tail is most likely male (rarely, females will have significant notching on the tail).

[Calfirecap]

As Miguel stated the tail notching is not definative. I've found that the markings just below the eye to be the best indicator with male having a large white tear drop. This can often be seen at hatching. Females tend to either lack markings or have a very linear white line.
The first photo is of a male with the classic white tear drop. The second is a notched tail female. The third photo is that same female. The fourth photo is of a female with the linear white marking.

Lawrence