You’ve seen simple math problems: “Which of these shapes is not like the other?” Most toddlers can point out a circle in a row with squares. Experts thought only humans have that shape-sorting skill. It turns out crows are in the know!  

Scientists in Germany placed two male carrion crows in front of a screen and displayed six shapes. They trained the birds to peck at the shape that was different. At first, it seemed the crows’ actions were based on caws (er—cause) and effect. The scientists rewarded correct crow pecks with mealworm and seed pellet treats.  

The test started out simple. Researchers showed one flower with five crescent moons. Easy peasy. The crows pecked at the bloom.  

Then the test got harder. The screen displayed squares and another four-sided figure that was just a bit off.  

The crows spotted the atypical shape, proving they grasp right angles and parallel lines. They even pecked correctly after scientists stopped giving them treats! 

Researchers have tried similar tests with baboons. They provided the baboons with plenty of training. But the primates couldn’t grasp the same math concepts that crows can. 

Germany’s lab crows are no strangers to challenges. They learn to play computer games, and scientists trained them to count dots in another study. The clever birds also mastered making a series of caws that match a number on a screen. They can count up to four with ease.  

Why does a crow need to tell shapes apart? That ability may help it navigate flight and spot its next meal. It also might help it recognize certain crows—and even find a mate.  
 
Why? God gave animals abilities that often astound people. These skills reflect that they are made by an intelligent, wise Creator.  

Recommended Reading: For more about crows, read Crow Smarts by Pamela S. Turner.