Bulls do not get angry at the color red. Here is what really makes a bull charge at a waving cape.
Can bulls even see red?
Our eyes have three kinds of color sensors, but cattle have only two. That means red does not stand out to a bull the way it does to us. Scientists say bulls are partly color blind, much like some people are.
So what makes them charge?
Bulls react to movement, especially something flapping close to them. When the cape is whipped around, the bull charges at the motion. The red color is mostly a tradition for the people watching.
One more thing
Bulls charge just as hard at a different cape that is pink and gold or blue.
