A king or queen who rules a country, especially one with total or nearly total power; also a large orange and black butterfly.
From Greek 'monos' (single) + 'arkhein' (to rule), literally 'sole ruler.' The butterfly was named 'monarch' because its bright colors make it look regal and important.
The Monarch butterfly's migration is so extreme—some travel 3,000 miles across North America guided by the sun, and they do it in only 4 generations, meaning individual butterflies are born with genetic instructions to fly routes they've never seen.
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