An ostrich’s eye is bigger than its brain.

There may as well be an entire section dedicated to ostriches in the book of Guinness World Records. They’re the world’s tallest and heaviest bird, and they have the largest eyes of any land animal. In fact, a single ostrich eye is so big that it’s larger than their whole brain.

The average ostrich eye measures roughly 2 inches across and is about the size of a billiard ball, with both eyes comprising around 5% of an ostrich’s total body weight. But the bird’s brain is a bit tinier; while it measures around 2.33 inches long, it’s only 1.66 inches wide and makes up a mere 0.015% of the bird’s overall weight. And an ostrich’s giant eyeballs aren’t just for show, as they provide the bird with excellent vision that allows it to see up to 2.2 miles away in daylight.