This Four-Winged Dinosaur Flew Like a Dragonfly, Not a Bird

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About 120 million years ago, a small feathered predator was gliding through the forests of what is now northeastern China. It had four wings — two on its arms and two on its legs — and for decades scientists assumed it was a clumsy experiment, a dead end on the way to the two-winged birds we know today.

New research says that picture was wrong. Microraptor wasn’t a primitive failure. It was a sophisticated flyer that used aerodynamic tricks no living vertebrate uses, tricks that look far more like a dragonfly than a pigeon.

The study, published in the Proceedings of the National Academy of Sciences and led by Michael Pittman at the Chinese University of Hong Kong, used detailed computer simulations of airflow to analyse exactly how Microraptor’s four wings worked together. The team drew on over 100 fossilised specimens to build the most accurate wing model of the animal ever attempted.

The Wings Worked Together, and That Was the Point

In birds and bats, flight follows a simple logic: two wings push air down and the animal goes up. Microraptor’s setup was more complicated. Its rear leg-wings sat just behind and below its front arm-wings, like a biplane.

Scientists had known this arrangement for years. What nobody could show was whether the back wings were genuinely useful, or just dead weight.

The new analysis shows they were far from useless. Air flowing off the front wings curled downward and struck the rear wings from below, generating additional lift through a process called a leading edge vortex. The tip of each rear wing also created a spinning column of air that added extra upward force. Both effects are well documented in dragonflies, which have used a four-wing system to fly efficiently for 300 million years. No bird or bat does this.

“This helps us understand how the forelimbs and hindlimbs interacted and what behaviors were, and more importantly weren’t, possible,” said Thomas Dececchi, a collaborator from Dakota State University. “In the air at this same time were early birds and pterosaurs, so understanding how Microraptors could have exploited the airways is important to see how they hunted in the ancient skies.”

The four-wing arrangement also made Microraptor more stable in the air. Dragonflies are famously manoeuvrable partly because their tandem wing system resists sudden pitching and rolling. Microraptor appears to have benefited from the same property.

A Stepping Stone to Modern Birds

This finding matters well beyond Microraptor itself. One of the biggest unsolved questions in palaeontology is how birds evolved flight. The two leading theories, that it began in tree-dwelling gliders or in fast-running ground animals, have clashed for decades without resolution.

Microraptor changes the picture. It shows that a four-winged phase of flight was not just possible but aerodynamically sophisticated. This was not a design that was quickly abandoned. It was a genuinely capable way of moving through the air.

Eventually the four-wing system disappeared. As the front wings grew more powerful, the rear leg-wings became redundant, and losing them freed up the legs for better movement on the ground. The shift from four wings to two was not a correction of an earlier mistake. It was a gradual trade, giving up one kind of aerial advantage for another.

A Crow-Sized Predator With a Dragonfly’s Secrets

Microraptor itself was not large. About the size of a crow and weighing roughly 600 grams, it would have been dwarfed by many animals in its forest. But its aerodynamic abilities likely made it a capable hunter from above, able to glide silently between trees and strike from height.

The team’s next step is to simulate what happens when the wings actively flap, rather than glide passively. Understanding powered flight in Microraptor could further reshape how scientists trace the long road from feathered dinosaur to modern bird.

Every time you watch a bird lift off, you are seeing the endpoint of a story that passed through creatures like Microraptor, animals that flew on four wings, managed airflow with insect-like precision, and quietly gave rise to something that now fills every sky on Earth.

Quotes in this article are drawn from a press release issued by Dakota State University, February 2026. The study “Microraptor reveals specialized gliding capabilities in multiwinged early paravians” was published in the Proceedings of the National Academy of Sciences. DOI: 10.1073/pnas.2518106123.

References

Primary source

Pittman, M. et al. “Microraptor reveals specialized gliding capabilities in multiwinged early paravians.” Proceedings of the National Academy of Sciences, 123(6), e2518106123. (2026).

Supporting Microraptor anatomy studies (same research group)

Grosmougin, M. et al. “Forelimb feathering, soft tissues, and skeleton of the flying dromaeosaurid Microraptor.” BMC Ecology and Evolution, 25(1): 65. (2025).

Chotard, M. et al. “New information on the hind limb feathering, soft tissues and skeleton of Microraptor (Theropoda: Dromaeosauridae).” BMC Ecology and Evolution, 25(1): 37.

Earlier Microraptor flight studies (background/context)

Chatterjee, S. & Templin, R.J. “Biplane wing planform and flight performance of the feathered dinosaur Microraptor gui.” Proceedings of the National Academy of Sciences, 104(5): 1576-1580. (2007).

O’Connor, J., Zhou, Z. & Xu, X. “Additional specimen of Microraptor provides unique evidence of dinosaurs preying on birds.” Proceedings of the National Academy of Sciences.

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