Different species can perceive the same object in completely different ways because their eyes and brains detect different ranges of light.
For example:
- Humans normally have 3 kinds of cone cells (trichromatic vision).
- Dogs have fewer colour receptors, so their world is more limited in colour.
- Birds often have 4 types of cones and can see ultraviolet light.
- Bees can see ultraviolet patterns on flowers that humans cannot see at all.
- Some snakes can detect infrared radiation (heat).
So a flower or leaf that appears ordinary green to you may look completely different to a bee or bird.
A bee may see glowing ultraviolet patterns guiding it toward nectar — patterns completely invisible to humans.
This raises an important philosophical and scientific point:
There may not be a single “true” visual appearance of the world.
Every species experiences a version of reality shaped by:
- its sensory organs,
- nervous system,
- and evolutionary needs.
Humans see only a tiny slice of the electromagnetic spectrum. What we call “visible light” is just the narrow band our species evolved to detect.
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