“Bulls are enraged by the color red”

The enduring image of a bull charging a matador's vibrant red cape is a classic one, deeply ingrained in popular culture and often cited as proof that the color red ignites a bull's fury. This misconception likely stems from the historical and theatrical tradition of bullfighting itself, where the striking red muleta has become an iconic symbol of the spectacle. For centuries, audiences have witnessed this dramatic interaction, naturally associating the bull's aggressive charge with the vivid crimson fabric.

However, scientific evidence busts this colorful myth. Bulls, like all other cattle, are dichromatic, meaning their eyes possess only two types of color-detecting cone cells, unlike humans who typically have three. This visual system limits their color perception, making them unable to distinguish red from green. Instead, red likely appears as a dull yellowish-brown or grayish hue to them. Therefore, it is not the hue of the cape that provokes the animal, but rather the swift, erratic movements of the matador's cape as it is whipped and waved. Experiments have shown that bulls react with equal aggression to capes of any color, provided they are in motion.

The real reasons behind the matador's choice of a red cape are far more practical and human-centric. The color red was primarily chosen for its dramatic effect, enhancing the visual spectacle for the human audience. Additionally, and perhaps more importantly, the vibrant red effectively masks bloodstains from the bull and any potential injuries to the matador, making the often-gruesome elements of the fight less apparent to spectators. The pervasive belief in the myth continues largely due to its repeated portrayal in various forms of media, from cartoons to movies, which consistently reinforce the dramatic, albeit inaccurate, narrative of a bull enraged by red.