The girl can run faster than the boy and the boy are bigger than the girl. You can also spot the different by poking them, then the one that bite is the female.
one has a penis
I think by looking at it's scales.
If it has a spot on its bottom it's a boy if not a girl
size and color
there are only girl whip tail lizards
yes he has a boy and a girl
usaully the girl lizards are bigger than the boy.
if your talking about boy and girl the girls spots are lighter colored
sam, alex, bobby, robin
hi you tell a boy from a girl lizard by the thickness of the tail the boys tail are more thick than girls
usally the girl lizard is bigger than the boy
You do not tell if it is a boy or a girl by looking at it's color, the color changing green means the lizard is happy and if it is brown it means it is stressed.