- Larger head and body size.
- Broader shoulders and chest.
- Longer tail.
- More prominent cheek pouches.
- Testes may be visible as two small bumps near the base of the tail.
Female:
- Smaller head and body size.
- Narrower shoulders and chest.
- Shorter tail.
- Smaller cheek pouches.
- Two rows of nipples located on the underside of the belly.