Related Clues:

• Soil aerators
• Busy builders
• Echidna's snacks
• They may be in one's pants
• Silent army
• Aardvark's lunch
• Small hill builders
• They live in a hill
• Aardvark's entree
• Entomologist's specimens, perhaps
•     Hill inhabitants
• Residents of some farms
• Tiny workers
• Aardvark snacks
• Some colonists