Crows Process Decisions Twice as Fast as Humans Study Reveals

Crows can make visual decisions twice as quickly as humans and monkeys, Mirage News reported based on research from the University of Tübingen.

When tested in trials featuring a pair of carrion crows, the animals took a mean time of only 235 milliseconds to figure out the trajectory of a shifting dot pattern and act on their choice.

Despite their remarkable speed, they remained highly accurate. Reported in the journal Science, the discoveries provide fresh perspectives on how avian minds handle information and make decisions.

Fast Responses in Bird Brains

Investigators Philipp Schmidbauer and Professor Andreas Nieder at the University of Tübingen’s Institute of Neurobiology observed that the swift reactions of the crows corresponded with striking levels of cellular activity inside their brains. To test the birds’ decision-making abilities, the researchers presented them with moving dots on a touchscreen.

The animals had to ascertain whether the majority of the dots were moving toward the left or the right side, and then signal their choice by pecking a designated target on the matching side of the display screen. The birds performed remarkably well, even when the direction of movement was difficult to identify.

“Even when the patterns of motion were hard to recognize, the crows’ decisions were still better than random choices, and with clear signals, they achieved an accuracy of nearly 100 percent,” Philipp Schmidbauer reports, according to Mirage News.

Neural Activity at 70 Milliseconds

The team recorded neural activity in a part of the bird brain called the nidopallium caudolaterale. Functioning in a manner comparable to the human prefrontal cortex, this specific area takes on a vital part in handling data and guiding choices.

The recordings revealed that the crows’ brains began distinguishing between the two possible directions almost immediately. A mere 70 milliseconds following the appearance of the moving dots, neurons tied to the distinct options already displayed clear and separate firing patterns.

As the animals assessed the shifting visual patterns, their brain activity rose progressively until hitting a critical limit linked to the finalization of a choice. The recorded patterns demonstrated both the distinctness of the directional cues and the specific path ultimately chosen by the bird.

Crows Use Neural Processes Similar to Primates for Decision-Making

Among the most fascinating discoveries is that crows seem to arrive at choices via brain mechanisms comparable to those seen in humans and other primates, despite having vastly different neural layouts.

“These findings show that neuronal dynamics in the avian brain are consistent with established models of decision-making in humans and non-human primates,” said Andreas Nieder.

Unlike mammals, birds do not have a cerebral cortex organized into layers. Nevertheless, their brains appear capable of following the same fundamental principles for evaluating evidence and reaching decisions.

Evolutionary Demands for Speed

In this visual task, the crows completed that process twice as quickly as primates. The researchers suggest that this exceptional speed could reflect the demands birds have faced throughout their evolution.

For creatures that take flight and use their bills to engage with their environment, the capacity to quickly process visual stimuli and execute exact physical reactions holds immense significance.

“Birds rely on their vision to carry out precise, rapid maneuvers during flight and to guide their beaks towards objects when foraging,” Nieder explains, as reported by Mirage News.

Unanswered Questions in Avian Neurobiology

Additional investigations will be necessary to uncover how their distinct neurological wiring allows them to process comparable visual choices at speeds so much greater than those of people and monkeys.

Frequently Asked Questions About Crow Decision-Making

How many crows participated in the University of Tübingen experiments?

The experiments involved two carrion crows tested on a touchscreen task.

Which brain region was monitored during the study?

Researchers recorded neural activity in the nidopallium caudolaterale, a part of the bird brain analogous to the primate prefrontal cortex.

In which academic journal were the findings published?

The results were published in the journal Science.

What was the average response time recorded for the crows?

The birds needed an average of just 235 milliseconds to determine the direction of the moving dots and respond.