Related Clues:

• Some communicate using Yerkish
• 'Tarzan of the ___'
• Primatology study
• Graph references
• Mimics mockingly
• Dungeons & Dragons weapons
• Woods choppers
• Popular zoo attractions
• Yerkish speakers
• Guitars, to rockers
• Chimps, for instance
• Mocks by imitating
• Chimps, for example
• Baselines on a graph
• Big hatchets