Humans typically have trichromatic vision, meaning we have three types of cone cells that detect red, green, and blue wavelengths. However, animal color perception varies significantly across species:
- Most mammals are dichromats (two types of cone cells), seeing fewer colors than humans
- Birds and some reptiles are tetrachromats, having four types of cone cells, allowing them to see ultraviolet light
- Dogs see primarily blues and yellows, with limited red perception
- Butterflies can have up to 15 different photoreceptors
These differences evolved based on each species’ survival needs and environmental adaptations. For example, bees’ UV vision helps them identify nectar patterns in flowers that are invisible to humans.