Use 'dodo' when discussing species that have disappeared forever, often due to human impact. Like the dodo, many species have become extinct because of habitat destruction.
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Historical Reference
The dodo is often used to discuss history, especially about Mauritius and 17th-century explorations. The dodo is an iconic representative of the fauna that was encountered during historical voyages to Mauritius.
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Cultural Symbol
'Dodo' can symbolize outdated things or concepts that no longer exist. Like the ancient cassette tape, my old computer is basically a dodo now.