Do bulls hate red? See the cape through cattle eyes
No. Cattle have two colour types in their eyes, where you have three, so a red cape looks like a dull khaki to a bull. What makes a bull charge is the cape moving, not its colour. Pick a cape and swap your eyes for a bull's.
Wave the cape
Red cape, as you see it.
The verdict: to a bull, the red cape and the green cape look much more alike than they do to you.
All the capes, side by side
You see
- Red cape
- Pink cape
- Yellow cape
- Green cape
- Blue cape
A bull sees
- Red cape
- Pink cape
- Yellow cape
- Green cape
- Blue cape
Red tulips for a bull
Same idea with flowers: drag the line to compare your view with the cow's.
A simulation made from published eye studies. Not what the animal feels.
So why does a bull charge?
Because the cape moves. When the TV show MythBusters tested it in 2007, the bull went for moving targets whatever their colour. Read how they tested it.
- The cow sees mostly blues and yellows. Red and green look alike.
- Red ball in green grass? A cow loses it: red and green look like the same khaki.
- Want a cow to spot a toy? Pick blue or yellow, not red.
Questions
Do bulls hate red?
No. The cow sees mostly blues and yellows. Red and green look alike. A bull charges at the moving cape, whatever its colour.
Why is the cape red, then?
Tradition and show. The red is for the crowd, who see it far more vividly than the bull does.
What colour does a bull see the cape as?
Red looks like a dull khaki to a cow. Try the buttons above to see it.