Quote Originally Posted by UncleChester View Post
Have you ever found a Leopard frog with a noticeably large tympanum? There's a couple of definite males in the picture below (the one calling and the one on the right) whose eardrums are 'small'. This is the typical size of tympanum for both sexes from my experience wading around breeding ponds. I'd hypothesize that someone believed since this difference in the sexes was the case for some Ranid species, that it must apply to others (it's very obvious in adult Rana clamitans for example). That, or the populations near me are abnormal.
No, not like with a green frog or a bullfrog. I've noticed some have bigger ears than others. But it is probably natural variation between individuals. It's been a while since I've caught leopard frogs. There are none in my pond or in my aunt's pond across the road. I did find a baby pickerel frog in my pond earlier this year which was very strange. I've never seen them in this area before either. Anyway, next time I find a population of leopard frogs I'll make sure to pay closer attention.