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The largest flying dinosaur was Argentavis, which had a 23 feet (7 meter) wingspan.
There have been other large flying creatures in world's history, but some of them were not dinosaurs and others did not fly, but rather glided. The largest flying dinosaur was Argentavis, also known as "Argentavis magnificens" which means "magnificent Argentine bird." It lived 6 million years ago in the region that is now known as Argentina.
Argentavis was so large that it probably had to run downhill in order take off into flight. It had strong legs and large flight muscles. Experts who studied Argentavis' fossils estimate the flying dinosaur had a height of 5.6 to 6.5 feet (1.7 to 2 meters) and it weighed between 140 and 180 pounds (60-80 kilograms). It could fly at speeds up to 40 miles (64 kilometers) per hour.
More about flying creatures:
Argentavis was not a dinosaur except in the sense that all birds are (avian) dinosaurs. Argentavis existed approximately 6 million years ago but unfortunately all of the dinosaurs except for birds were wiped out 65 million years ago. Pterosaurs which were technically not dinosaurs were also wiped out in this extinction. Labelling Argentavis a dinosaur is somewhat misleading, because it was as much a dinosaur as an eagle is today.
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