Possible Clues:

• Is holding the scent spray and they may be sprayed
• Some buzzers
• They may put out feelers
• Religious fanatics might be crawlers, perhaps
• Most animals
• Bees, flies, etc.
• Cockroaches and cicadas, e.g.
• Six-footers in the bodies of religion
• Entomologist's subjects
• They're all six-footers in such bodies