Humans have trichromatic vision, meaning we have three types of cone cells that detect red, green, and blue wavelengths. However, color perception varies significantly across species:
- Birds and some insects can see ultraviolet light, which is invisible to humans
- Dogs are dichromatic, having only two types of cone cells, making them partially colorblind compared to humans
- Butterflies have up to 15 different photoreceptors, allowing them to see a much broader spectrum of colors
These differences evolved based on each species’ survival needs. For example, bees’ UV vision helps them identify nectar patterns in flowers, while a dog’s limited color vision is compensated by superior night vision and motion detection.