Cats are ambush predators. If you’ve ever been ambushed by your own cat, this will come as no surprise. This also explains why cats love to hide behind doors prior to pouncing on unsuspecting toys.
“Species with pupils that are vertical slits are more likely to be ambush predators that are active both day and night. In contrast, those with horizontally elongated pupils are extremely likely to be plant-eating prey species with eyes on the sides of their heads.”
” Circular pupils were linked to “active foragers,” or animals that chase down their prey.”
Humans have circular pupils.
But wait, there’s more.
“A surprising thing we noticed from this study is that the slit pupils were linked to predators that were close to the ground,” said William Sprague, a postdoctoral researcher in Banks’ lab. “So domestic cats have vertical slits, but bigger cats, like tigers and lions, don’t. Their pupils are round, like humans and dogs.”