Why Scientists Call Crows the “Einstein” of the Bird World

Most of us barely pause at a passing crow—just another black bird on a wire, another distant caw. Yet, inside research labs and deep South Pacific forests, that same bird quietly rewrites what intelligence looks like.

Among corvids — the family that includes crows, ravens, and jays — the New Caledonian crow (Corvus moneduloides) has become something of a scientific celebrity. These birds don’t just use tools. They select them with care. In some cases, they even shape them to fit a specific task.

What stands out is how deliberate their choices appear. Confronted with a problem—like food at the bottom of a narrow hole—the crow doesn’t just poke around. Instead, it pauses, looks, and chooses a tool that fits. Rather than guessing, researchers say this behavior resembles measuring.


Choosing the Right Stick

In the early 2000s, Oxford researcher Alex Kacelnik and his team ran a series of controlled experiments. They offered New Caledonian crows sticks of different lengths and widths. Only one stick could reach the food, which was placed deep inside a tight hole.

Time and again, the birds picked the stick that matched the hole's depth and width, often choosing correctly on the first attempt.

That distinction matters. If the birds were relying on trial and error, frequent testing would be expected. Instead, they seem to assess the space, select their tools accordingly, and act much like someone testing keys in a lock.

Field research backs this up. Scientists found wild New Caledonian crows chose longer tools for deeper holes. The birds consistently matched tool length to task depth.



Using Tools to Get Tools

The story doesn’t end with a single stick.

In experiments led by Alex Taylor and colleagues, crows were presented with a new kind of challenge. To reach food, they first had to use one tool to retrieve a second, better tool. Only then could they get the reward.

This is known as “meta-tool use,” which means using one tool to obtain another tool needed to solve a problem. The crow had to understand that the first object was not the solution but a step toward it.

Sequencing and planning come into play. The bird must think ahead: obtain tool A, unlock access to tool B, and finally use tool B to retrieve food. For years, researchers thought such layered problem-solving belonged to primates. Crows, however, change that paradigm.

Practice Makes Precision

Tool use in crows isn’t rigid. It improves with experience.

In a 2025 study, carrion crows with no tool-use experience learned precise stick manipulation after thousands of trials. Initially, their movements appeared clumsy. Over time, their grip grew steadier, their aim sharpened, and their actions became increasingly efficient.

They adjusted angles. They refined pressure. They adapted.

Such improvement isn’t accidental. Instead, it demonstrates flexibility—the ability to learn from feedback and refine technique. Humans show the same traits when mastering a new skill.



What’s Happening in the Brain

Researchers have also looked inside the crow’s brain while it learns.

In experiments inspired by the classic water-raising puzzle, crows dropped stones into tubes to bring floating food within reach. As they practiced, scientists observed shifts in neural activity. Early attempts activated broader sensory regions. With experience, activity concentrated in motor-control areas.

Simply put, the brain reorganizes as these skills grow smoother.

This pattern mirrors human learning: our brains work broadly and intensely at first, then streamline as we gain mastery.

Although built differently from a mammal’s, the crow's brain can adapt in similar ways.

Planning for the Future

Crows also seem to recognize that some tools are better than others.

When given a choice between a simple stick and a specially shaped hooked tool, New Caledonian crows treated the hooked tool as more valuable. They reused it and guarded it more carefully.

In further studies published in Proceedings of the Royal Society B, the birds even selected the tools they would need for a task presented later. When shown several objects and later faced with a challenge, they had already chosen the correct one in advance.

That suggests foresight — preparing for a future problem before it appears.

Rethinking Intelligence

For a long time, tool use was held up as a uniquely human trait. Then primates joined the club. Now, crows stand firmly in that conversation.

They assess space, match tools to tasks, use tools to retrieve other tools, refine movements through practice, and plan.

All of this happens inside a bird's brain, structured differently from our own yet capable of strikingly similar flexibility.

So the next time a crow lands nearby, it may be worth a second look. Beneath those glossy black feathers is a mind that evaluates, adjusts, and anticipates.

When scientists call them the “Einstein” of the bird world, it isn’t exaggeration. It’s a recognition earned stick by stick, choice by careful choice.