The eye of an ostrich is bigger than its brain. Its eyes are around the size of a billiard ball. One eye is also smaller than the other. Perhaps this is why they tend to run in circles.
100 Mind-Blowing Billiard Facts
An ostrich’s brain size is smaller than its eyeball. Talk about a bird’s brain. The average size of an ostrich’s brain is 59.26 x 42.30 mm, meaning the ostrich’s brain is smaller than either of its eyes which are the size of billiard balls.