Interesting examination of vision in non-mammals
“Primates and humans have three photoreceptors and can only see four basic colors, red, green, blue and yellow,” says Jay Neitz, Ph.D. “Birds, fish and reptiles have four photoreceptors, allowing them to see things we cannot. They must see an entire dimension of color, including ultraviolet, infrared and all the combinations thereof, which we miss.”
The above is an excerpt from an article on ScienceDaily.com. The full article can be found here.



