Serrata males have a longer tail and a thicker base of the tail. The anal opening is far from the rear edge of the plastron, the center of the plastron is slightly concave, and the eyes are mostly black; The posterior edge is relatively close, the center of the plastron is flat, and the eyes are mostly red.

The males of serrata suffered loss of appetite in late April, became restless, and Subsequently, the tip of the nose becomes red, and the external penis will stretch out under the stimulation of the water splash. At this time, males often bite and fight with each other when encountering males, and when encountering females, they will crawl on their backs to mate. Sawtooth females will have reduced movement during the mating period, and the cloaca dilation behavior will appear when stimulated or even unstimulated, and will cooperate with the male's courtship behavior for mating. The spawning period is from June to July every year, but some farmers have observed the phenomenon that the wild tortoises are breeding from September to October.