Most mammals are partially color blind and are unable to see the color red, so many mammals don’t see the red spotlight at all. Using the red light instead of a white light means that the animals aren’t blinded, and are more comfortable in their surroundings.
How Animals See Colour
Different animals have different numbers of cones in their eyes, which means they are able to see different colours.
For example, cats have very few cones in their eyes, so they can only see blue and green colours. This is why cats seem to be attracted to things that are blue or green in colour.
Dogs have more cones in their eyes than cats, so they can see yellow and blue colours, but not green. This is why dogs seem to be attracted to things that are yellow or blue in colour.
Red Light vs White Light
For animals that can see color, red light is not as visible as white light. This is because red light has a longer wavelength than white light, and the cones in animal’s eyes are not sensitive to long wavelengths.
This means that when animals are exposed to red light, they don’t see it as brightly as they would if it were white light.
Why Use Red Light?
Many zoos and animal sanctuaries use red light at night instead of white light. The reason for this is that red light doesn’t blind or startle animals the way that white light does.
This is especially important for nocturnal animals who are active at night. Red light also doesn’t disrupt the circadian rhythms of animals as much as white light does.
What Do Animals See?
So, if animals can’t see the color red, what colors can they see? This depends on the type of animal. For example, dogs and cats can only see blue and green, while rats and bats can see blue, green, and ultraviolet light. Insects, on the other hand, can see a wide range of colors, including ultraviolet light.
In conclusion, animals perceive colors differently than humans do. Most mammals are unable to see the color red, which is why many zoos and animal sanctuaries use red light at night instead of white light.
The use of red light doesn’t blind or startle animals the way that white light does and it also doesn’t disrupt the circadian rhythms of animals as much as white light does.
Each type of animal sees a different range of colors depending on their species. Dogs and cats can only see blue and green while insects can see a wide range of colors, including ultraviolet light.