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The passenger pigeon, which once numbered in the billions, became extinct when the last individual died in captivity.
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Passenger pigeon
Extinct migratory pigeon previously endemic to North America
The passenger pigeon or wild pigeon is an extinct species of pigeon that was endemic to North America. Its common name is derived from the French word passager, meaning "passing by", due to the migratory habits of the species. The scientific name also refers to its migratory…Source: Wikipedia (CC BY-SA)
Martha (passenger pigeon)
Last known passenger pigeon
Martha was a passenger pigeon, the last known of her species; she was named "Martha" in honor of Martha Washington, the first lady of the United States from 1789 to 1797.Source: Wikipedia (CC BY-SA)