Related Clues:
- Some of them have learned to sign
- Graceless ones
- Jungle swingers
- Zoo primates
- Chimps and orangs
- Large primates
- Tarzan's foster family
- Most hominoids
- Dr. Zaius and others
- Heston's hairy co-stars
- Gorillas, for instance
- Chimps and kin
- Goodall subjects
- Extras in the opening of "2001: A Space Odyssey"
- Inhabitants of a sci-fi planet