Crows excel in geometric shape recognition

Black crows have demonstrated an extraordinary ability to distinguish irregular geometric shapes in a complex test, a cognitive skill previously thought to be exclusive to humans. This ability was tested in a controlled experiment involving various geometric shapes.

The test involved identifying odd shapes

In the experiment, a screen displayed six geometric shapes, five of which were identical, and one was slightly twisted, asymmetrical, or unusual. The crows had to peck at the "odd" shape to receive a reward, showing they could recognize subtle differences in shape.

Crows outperformed baboons in the task

Despite the increasing difficulty of the test, which included nearly identical shapes like quadrilaterals with subtly different contours, the crows consistently identified the correct shape. This performance outstripped that of baboons, who failed to complete the task even after intensive training.

The cognitive ability suggests abstract understanding

The crows' success indicates an abstract understanding of geometric regularity rather than simple training or habit recognition. This ability involves identifying shapes based on properties such as the length of sides or angles, a task previously thought to be beyond non-human animals.

Evolutionary reasons for the skill

Scientists believe this geometric intelligence may have evolved due to the crows' lifestyle, which includes navigating complex environments and recognizing individuals. Recognizing a face or a fellow crow relies on analyzing spatial relationships, which may have driven the development of this skill.

Crows show intelligence without a cerebral cortex

Despite lacking a cerebral cortex like mammals, crows have developed highly flexible behaviors, proving that intelligence can emerge through different evolutionary paths. This discovery highlights the diverse ways in which intelligence can manifest in the animal kingdom.

The study opens new avenues in animal intelligence research

Published in Science Advances, the study marks the beginning of an exciting field of exploration into the cognitive abilities of corvids. Researchers suggest that while crows may not be the only animals capable of such feats, this discovery has opened a new door in understanding animal intelligence.