Uroplatus can be sexed after they have reached maturity. Certain species make leaf-tailed gecko sexing is easier because they are sexually dimorphic — meaning that males and female have different physical characteristics. For example:
- male U. phantasticus have notches in their tails, while females do not
- female U. lineatus have white dotted lines on each side of their spine; males’ spots are more randomly distributed
However, not all Uroplatus species can be sexed right out of the egg. The most reliable way to sex a leaf-tailed gecko is to wait until it has almost grown to its adult length, and then check the area between the vent and tail.
Male leaf-tailed geckos have a noticeable hemipenal bulge behind the vent.
Female leaf-tailed geckos do not have a bulge.
**Males and females should not be housed together unless you intend to breed them.**