Humans have trichromatic vision, meaning we have three types of cone cells that detect red, green, and blue wavelengths. However, many animals perceive color quite differently:
- Dogs and cats are dichromats, having only two types of cone cells, making them partially colorblind compared to humans
- Birds have tetrachromatic vision, with four cone types that allow them to see ultraviolet light
- Butterflies have five or more cone types, enabling extraordinary color discrimination
This variation in color perception has evolved based on each species’ survival needs. For example, bees’ UV vision helps them identify nectar-rich flowers, while a cat’s limited color vision is compensated by excellent night vision.