Humans and animals have significantly different color perception capabilities due to variations in their photoreceptors. Humans are trichromats, meaning we have three types of cone cells that detect red, green, and blue wavelengths. However, many animals see colors quite differently:
- Dogs are dichromats, seeing primarily blues and yellows
- Birds have tetrachromatic vision, seeing four color channels including ultraviolet
- Butterflies can have up to 15 different photoreceptors
- Some shrimp species have 16 color receptors
This means many animals can see colors that humans cannot perceive, particularly in the ultraviolet spectrum. Conversely, some animals like cats and dogs see fewer colors than humans but often have superior night vision due to more rod cells.