Benton Walters stared at the silhouette of a Pteranodon wing—again—and something still didn’t add up. At the University of Bristol, where he studies ancient flight, he’d long been struck by how uniform pterosaur reconstructions looked, despite the animals spanning 100 million years and ranging from the size of a sparrow to a small airplane. If modern flying animals like birds and bats show wildly different wing shapes based on lifestyle—soaring, flapping, hovering—why did pterosaurs all seem to have the same basic wing design? That question led to a study that’s now challenging decades of paleontological assumptions.
Pterosaurs were the first vertebrates to master powered flight, soaring above dinosaurs for over 100 million years before vanishing 66 million years ago. Some, like Quetzalcoatlus, had wingspans exceeding 10 meters—about the length of a school bus—making them the largest animals ever to fly. Yet despite their dominance of prehistoric skies, no fossil has ever preserved the full shape of a pterosaur wing. Reconstructions rely on bone structure and rare soft-tissue impressions, leaving scientists to piece together the rest. Walters and his team suspected these reconstructions might be missing crucial variation.
To test this, they used a method called theoretical morphospace, mapping all possible wing shapes these creatures could have had based on biomechanical and aerodynamic principles. They analyzed nine well-known species, including Pteranodon and the colossal Quetzalcoatlus. The results were revealing: actual reconstructions occupy only a small fraction of the possible functional wing shapes. In other words, pterosaurs could have had diverse wings—yet current models show little of that variety.
"In living flying animals, such as birds and bats, different lifestyles are associated with distinct wing shapes and flight abilities. The lack of comparable diversity in pterosaur reconstructions suggests that the reconstructions are missing important variation," Walters said. This gap isn’t just about appearance—it affects how we understand pterosaur behavior, habitat, and evolution. A narrow wing might suggest fast, long-distance flight, while a broad one could point to maneuverability in dense forests. Assuming all pterosaurs had similar wings limits our understanding of their ecological roles.
The study, published in Paleobiology, doesn’t claim to know what all those missing wing shapes looked like—but it does provide a framework to test future reconstructions. New imaging techniques, like ultraviolet and laser-stimulated fluorescence, are already revealing soft-tissue details invisible to the naked eye. As these tools become standard, scientists may finally see pterosaurs not as a single archetype, but as a dynamic group that evolved flight in ways we’re only beginning to imagine. The sky, it seems, wasn’t the limit—it was just the beginning.