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The largest species of waterfowl ever is believed to be the extinct Argentavis magnificens, a giant bird that lived approximately six million years ago in South America. Argentavis had a wingspan of up to 23 feet (7 meters) and weighed around 150 pounds (68 kilograms). It is classified as a member of the teratornithids, a group of large flying birds. While not a traditional waterfowl, its size and some ecological habits link it to water-related environments.

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2mo ago

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