Complex sentence: Bullfrogs are dimorphic, with males being smaller than females, and having yellow throats tympani larger than their eyes, whereas the tympani in females are about the same size as the eyes.
Split into simpler sentences: Bullfrogs are dimorphic, with males being smaller than females and having yellow throats. Males have tympani larger than their eyes, whereas the tympani in females are about the same size as the eyes.