An Immense World: How Animal Senses Reveal the Hidden Realms Around Us

by Ed Yong

Humans outshine almost every other animal at resolving detail. Our exceptionally sharp vision, Melin realized, gives us a rarefied view of a zebra’s stripes. She and Caro calculated that on a bright day, people with excellent eyesight can distinguish the black-and-white bands from 200 yards away. Lions can only do so at 90 yards and hyenas at 50 yards. And those distances roughly halve at dawn and dusk, when these predators are more likely to hunt. Melin was right: The stripes can’t possibly act as camouflage because predators can only make them out at close range, by which point they can almost certainly hear and smell the zebra. At most distances, the stripes would just fuse together into a uniform gray. To a hunting lion, a zebra mostly looks like a donkey.[*10]