106-Million-Year-Old Tracks Show Pterosaur Hunting on Land

A set of 106-million-year-old footprints discovered in South Korea is rewriting what scientists know about pterosaurs, showing these flying reptiles may have been skilled hunters on land, not just masters of the sky.

The tracks, preserved in the Jinju Formation, belong to a newly identified species called Jinjuichnus procerus. They reveal large, asymmetrical impressions with elongated digits that match the anatomy of neoazhdarchian pterosaurs, a group that includes some of the largest flying animals ever to exist.

For decades, popular imagination has placed pterosaurs firmly in the air, gliding over ancient coastlines during the Mesozoic era. But their long limbs and body proportions tell a different story, one that paleontologists have been piecing together for years.

Dr. Jongyun Jung from the University of Texas at Austin and the Korea Dinosaur Research Center explains that pterosaurs occupied diverse ecological niches with varied feeding strategies. The skeletal structure of some groups, particularly the neoazhdarchians, looks remarkably similar to modern wading birds like storks and cranes that hunt by walking through shallow environments.

Why This Inspires

What makes this discovery truly remarkable is what was found alongside the pterosaur tracks. A second set of smaller footprints, likely from a lizard or salamander, runs parallel to the larger ones with a telling pattern.

The smaller animal's tracks show a sudden change in direction and an increase in stride length, suggesting rapid movement. Meanwhile, the pterosaur was moving at about 0.8 meters per second, indicating steady, purposeful locomotion on land.

The two trackways running so close together paint a vivid picture of a possible chase, frozen in time for 106 million years. It's a rare glimpse into a moment of interaction between ancient animals, captured in stone.

The research team, publishing in Scientific Reports, remains cautious about declaring this definitive proof of hunting behavior. The alignment could be coincidental, and fossilized tracks record motion but not intent.

Still, this evidence fills a significant gap in understanding how these animals actually lived. Finding clear, direct evidence of terrestrial behavior in pterosaurs is extraordinarily uncommon, making these footprints a valuable piece of the puzzle.

The discovery suggests these ancient fliers were far more versatile than previously imagined, adapting to hunt on land with strategies comparable to today's terrestrial stalkers. It's a reminder that even creatures we think we understand can still surprise us millions of years later.