Across 165 million years of silence, scientists have recovered something once thought irretrievable: the voices of Jurassic insects. By reading the fossilized wing structures of ancient katydids as acoustic blueprints, researchers have reconstructed ultrasonic calls that predate any previously known evidence of such communication — offering not just a discovery about a single species, but a new way of listening to deep time itself. The past, it turns out, left behind not only bones and footprints, but sound.
Scientists Reconstruct 165-Million-Year-Old Jurassic Insect Calls
A bridge across 165 million years, when the deep past becomes audible
Mark
So they actually heard the sound? Like, they played it back?
Mimi
Not exactly. They reconstructed what the sound would have been based on the physical structure of the fossilized wings. The wings have these tiny ridges and teeth that insects use to make sound—like a bow on a violin. By measuring those structures and understanding the physics, they could calculate what frequencies would have been produced.
Luke
That's important to be clear about. They didn't recover an actual recording. They modeled it based on anatomy. The confidence in that model depends on how well we understand modern insect acoustics and whether Jurassic katydids worked the same way.
Mimi
Right. But the wing structures are real and measurable. And what's remarkable is that the data suggests ultrasonic frequencies—sounds we can't hear. That's the novel part.
Mark
Why does ultrasonic communication matter? Why is that surprising?
Mimi
Because we thought that kind of sophisticated acoustic signaling evolved later. Finding it 165 million years ago pushes back the timeline significantly. It suggests insects had already developed complex ways of communicating that we didn't know about.
Luke
Though we should note—this is one species, one time period. We can't generalize to all Jurassic insects from this. And ultrasonic communication in insects exists today, so it's not entirely shocking that it existed then. The surprise is the age.
Mark
What can this tell us about the actual forest? Like, what was it like to be there?
Mimi
It gives us a sensory dimension we usually don't have. Fossils tell us what animals looked like and where they lived. But sound is part of the environment too. If katydids were making these ultrasonic calls constantly, that was part of the acoustic ecology. Other animals would have been responding to it, hunting by it, communicating within it.
Luke
Though we're still inferring a lot. We know these particular katydids made these sounds. We don't know how loud they were, how often they called, whether other insects were calling at the same time. The soundscape is still partly imagined.
Mark
Can they do this with other animals?
Mimi
That's the real frontier. Any animal whose sound-producing anatomy fossilizes could potentially be studied this way. Dinosaurs, pterosaurs, ancient birds—if the structures are preserved, the method could work.
Luke
Could work is the key phrase. We'd need to understand the anatomy of sound production in each case, and that's not always straightforward. But yes, this opens a new toolkit for paleontology.
O Pulso
- A team of paleontologists, biologists, and engineers has reconstructed the calls of katydids that lived 165 million years ago — the oldest animal sounds ever recovered from the fossil record.
- The discovery upends assumptions about evolutionary history: ultrasonic communication, once thought to be a relatively recent development, was already present in Jurassic forests.
- The breakthrough hinges on a surprising fact — insect wings fossilize in enough detail to preserve the ridges, teeth, and resonating chambers that produce sound, allowing researchers to reverse-engineer the frequencies these creatures generated.
- The reconstructed soundscape reframes how scientists understand ancient ecosystems, revealing that acoustic signals were shaping animal behavior and predator-prey dynamics long before the age of mammals.
- The method — now being called paleoacoustics — could be extended to other fossilized sound-producing structures, opening an entirely new dimension of inquiry within paleontology.
Across 165 million years of silence, scientists have recovered something once thought irretrievable: the voices of Jurassic insects. By reading the fossilized wing structures of ancient katydids as acoustic blueprints, researchers have reconstructed ultrasonic calls that predate any previously known evidence of such communication — offering not just a discovery about a single species, but a new way of listening to deep time itself. The past, it turns out, left behind not only bones and footprints, but sound.
A team of scientists has accomplished something that seemed beyond reach: they have heard insects that died 165 million years ago. By studying fossilized wing structures of ancient katydids preserved in stone, researchers reconstructed the calls these creatures made during the Jurassic period — what may be the oldest animal sounds ever recovered from the fossil record.
The key insight is that while soft tissues disappear over geological time, the intricate architecture of insect wings can survive fossilization. The ridges, teeth, and resonating chambers preserved in these specimens allowed scientists to reverse-engineer how the structures would have vibrated and what frequencies they would have produced. What emerged was evidence of ultrasonic communication — sounds far above the range of human hearing — marking the first known proof that ancient insects used such calls, a trait previously assumed to be a far more recent evolutionary development.
The implications reach beyond a single species. These reconstructed calls offer a window into the sensory world of a Jurassic forest, where insect acoustic signals were a constant feature of the environment, shaping how other animals navigated and hunted. Skeletal remains and footprints tell us what ancient life looked like; recovered sound begins to tell us what it felt like to inhabit those ecosystems.
The methodology itself may prove to be the most consequential finding. If fossilized wing structures can yield acoustic data, the same approach could be applied to other insects or any animal whose sound-producing anatomy survives in stone. This emerging field of paleoacoustics represents a fundamentally new way of reading the fossil record — one that treats preserved structures not only as evidence of appearance, but as blueprints for communication across deep time.
A team of scientists has done something that seemed impossible until now: they have listened to insects that died 165 million years ago. By studying the fossilized wing structures of ancient katydids preserved in stone, researchers reconstructed the calls these creatures made during the Jurassic period, capturing what may be the oldest known animal sounds ever recovered from the fossil record.
The work centers on katydids—relatives of grasshoppers and crickets—whose wings contain the physical machinery of sound production. Unlike soft tissues that vanish over geological time, the detailed architecture of insect wings can survive fossilization. By examining the preserved ridges, teeth, and resonating chambers on the fossilized wings of Jurassic katydids, scientists were able to reverse-engineer how these structures would have vibrated and what frequencies they would have produced.
What emerged from this analysis was evidence of ultrasonic communication—sounds pitched far above the range of human hearing. This discovery marks the first time researchers have found proof that ancient insects used ultrasonic calls, a trait previously thought to be a more recent evolutionary development. The finding reshapes our understanding of when and how complex animal communication systems emerged.
The implications extend beyond a single species or time period. These reconstructed calls offer a window into the sensory world of a Jurassic forest—what it would have sounded like to an ear attuned to those frequencies. Insects dominated terrestrial ecosystems during the Jurassic, and their acoustic signals would have been a constant feature of the environment, shaping how other animals navigated and hunted. By recovering these sounds, researchers gain insight into the texture of ancient ecosystems in a way that skeletal remains and footprints alone cannot provide.
The methodology itself opens new possibilities for paleontology. If fossilized wing structures can yield acoustic data, the same approach might be applied to other insects, or potentially to other animals whose sound-producing anatomy survives fossilization. This emerging field—sometimes called paleoacoustics—represents a fundamentally new way of reading the fossil record, one that treats preserved structures not just as evidence of what animals looked like, but as blueprints for how they sounded and communicated.
The work required collaboration across disciplines: paleontologists to identify and extract the specimens, biologists to understand how modern insect sound production works, and engineers to model how the ancient structures would have functioned. The result is a bridge across 165 million years, a moment when the deep past becomes audible in a way that changes how we imagine it.
Citações Notáveis
The work required collaboration across disciplines: paleontologists, biologists, and engineers working together to model how ancient structures would have functioned.— Research methodology
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