Yeah I know the differences, but thanks for enlightening me. Usually people who differentiate males from females go from the head structure and age to svl ratio rather than the colors of their underbellies. I'll be sure to listen during the 'rainy' seasons for my bullfrog to call. If this frog turns out to be a female it will be a hard decision whether or not to keep her, but this frog has taught me a lot about raising them from juveniles and I've only had it for a week + a couple days haha. Also, I've heard from people that females attitudes and personalities are better than some males, but I'm looking for massive size which leads me to want a male instead of a female.