tumblebug

/ˈtʌmbəlˌbʌɡ/
noun
  1. A type of beetle that rolls dung into balls and buries them as food for its young; also called a dung beetle.
    • A tumblebug was pushing a ball of dung across the dirt road.
    • Children watched the tumblebug roll its treasure with its back legs.
    • In many cultures, the tumblebug is a symbol of persistence and hard work.
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