The biggest difference between a male lion and a female lion is the size of the body, the color of the hair, the length of the mane, and the size of the head. Lioness has short hair, light gray, yellow or tan body color, and short, round ears.
In fact, it can be distinguished only from the outside. The male lion has a long mane, which is light brown, dark brown, black and so on. The long mane extends to the shoulders and chest. Those with longer manes and darker colors may be in lioness’s eyes.