CT scans reveal dodo was far more complex than centuries of myth suggested

Only two complete dodo skulls exist in the world. One has been held in Copenhagen for centuries, preserved in a museum vault, untouched by the tools that might reveal its secrets. That changed when researchers at the University of Lethbridge and colleagues from institutions in Denmark and Oxford decided to look inside without breaking anything open. Using high-resolution CT scanning, they created a three-dimensional model of the skull's interior cavity—the space where the brain once lived. What they found challenges three hundred years of certainty about what the dodo was.

The dodo has long occupied a peculiar place in human memory: the stupid bird, the one too simple to fear humans, the creature whose very name became synonymous with extinction. Early accounts painted it as slow and unintelligent, qualities that supposedly hastened its disappearance from Mauritius. But the skull tells a different story. When researchers digitally reconstructed the brain cavity and compared it with the brains of living pigeons and doves—the dodo's closest relatives—they found something unexpected. The dodo's brain was comparable in relative size to modern pigeons. The regions linked to learning and behavior were not reduced. The bird was not, by the measure of its own kind, simple.

What emerges instead is a creature finely tuned to a specific world. The dodo's eye sockets were relatively large, suggesting decent sensitivity to light, but the brain regions responsible for processing visual detail were smaller than expected. This mismatch points to a bird that did not rely on sharp, detailed vision the way many birds do. Instead, researchers believe it may have used a broader, less focused view of its surroundings—a sensory strategy common in animals active during low-light hours. The evidence suggests the dodo may have been crepuscular, active during dawn and dusk, when it could forage in cooler conditions and avoid the heat of midday.

But vision was only part of how the dodo experienced its island. The olfactory regions of its skull—the parts associated with smell—appear larger than those of many related birds, though this finding varies between specimens. If confirmed, it suggests the dodo relied more heavily on scent than its relatives, an ability that would have been invaluable in dense vegetation or when tracking seasonal changes in food availability. The bird's large, curved beak, iconic in every rendering, likely served more than a feeding function. Nerve pathways connected to the upper beak show signs of increased development, indicating the dodo may have used it as a sensory probe, gathering tactile information from its environment much as some modern birds do when searching for food in soil or leaf litter.

The inner ear structures suggest another adaptation: sensitivity to lower-frequency sounds. Lower tones travel farther through dense environments than high-pitched calls, which means the dodo could have communicated over longer distances or detected environmental cues that sharper hearing might miss. Taken together, these features paint a portrait of a bird shaped by life on an island without large predators. Survival in such conditions depended less on speed or vigilance and more on efficient foraging and environmental awareness. The dodo's sensory toolkit—smell, touch, low-light vision, and low-frequency hearing—reflects this balance. It was a creature adapted to search for food during cooler hours, using multiple senses to navigate a world that was, for most of its existence, safe.

Christy Anna Hipsley of the Natural History Museum Denmark described the work as detective work. Although the dodo's brain disappeared centuries ago, it left an imprint on the inside of the skull. By digitally reconstructing those spaces and comparing them with living birds, researchers could begin to piece together how the dodo sensed and behaved. The study does not answer every question about the extinct bird. Anatomy alone cannot fully explain behavior. But it narrows the gap between speculation and evidence, moving the dodo from myth toward something closer to understanding.

The research also demonstrates the value of museum collections and modern imaging technology. Specimens preserved for centuries can still yield new insights when studied with tools that did not exist when they were first collected. These same methods can be applied to other extinct animals, potentially reconstructing entire ecosystems from the past and revealing how species responded to environmental change. For the dodo, the work offers a final gift: not resurrection, but recognition. The bird was not simple. It was extraordinary, shaped by millions of years of evolution into something perfectly suited to its island home. That adaptation, which once kept it alive, could not protect it from what came next.