Males tend to have much larger, fleshier thumbs. That is how they hold onto her.
if it is a female it will be sitting if it is a male it will be jumping
One is a different color.
http://www.enchantedlearning.com/subjects/animals/Animalbabies.shtml It says 'female' on this site
A female frog has a bigger body.
Males use them to hold onto the female during amplexus.
From a female frog
How do you tell a male pacific frog from a female
Males croak all the time, Females only croak if they are about to be killed. A male frog will croak but a female frog will not.
You can tell by the size, male underground frogs tend to be much larger in size then a female frog!
amplexus
a frog consist in a group called ampibians . and there is no physical change in the charecteristics of frogs so a male frog and a female frog can be called in same names..........................
Only if the male is at least half the size of the female, as the female will recognise it as food.