The wandering albatross, a magnificent seabird that navigates the ocean winds and can glide almost endlessly over the water, boasts the biggest wingspan of any bird alive today, extending almost 12 feet (3.5 meters).
But it is a mere pigeon compared to an astonishing extinct bird called Pelagornis sandersi, identified by scientists on Monday from fossils unearthed in South Carolina, that lived 25 to 28 million years ago and boasted the largest-known avian wingspan in history, about 20 to 24 feet (6.1 to 7.4 meters).
Size alone did not make it unique. It had a series of bony, tooth-like projections from its long jaws that helped it scoop up fish and squid along the eastern coast of North America.
With its short, stumpy legs, it may not have been graceful on land, but its long, slender wings made it a highly efficient glider able to remain airborne for long stretches despite its size.
It belonged to an extinct group called pelagornithids that thrived from about 55 million years ago to 3 million years ago. The last birds with teeth went extinct 65 million years ago in the same calamity that killed the dinosaurs.
These birds lived very much like some of the pterosaurs, the extinct flying reptiles that lived alongside the dinosaurs that achieved the largest wingspans of any flying creatures, reaching about 36 feet (11 meters).
Its fossils were found in 1983 when construction workers were building a new terminal at the Charleston International Airport. Its skull is nearly complete and in great condition, and scientists also have important wing and leg bones, the shoulder blade and wishbone.
Until now, the birds with the largest-known wingspans were the slightly smaller condor-like Argentavis magnificens, which lived about 6 million years ago in Argentina, and another pelagornithid, Pelagornis chilensis, that lived in Chile at about the same time.
At about 48 to 90 pounds (22-40 kg), Pelagornis sandersi was far from the heaviest bird in history, with numerous extinct flightless birds far more massive.
PHOTO: An artist's reconstruction of the world's largest-ever flying bird, Pelagornis sandersi, identified by Daniel Ksepka, Curator of Science at the Bruce Museum in Greenwich, Connecticut
Photo: DR. KSEPKA/BRUCE MUSEUM