" Animals that exhibit eyeshine have a mirror-like membrane in the back of their eye called the tapetum lucidum that reflects light through the retina, making it easier for these animals to see in the dark. The colors that reflect back in the dark vary according to the different species of animal. Foxes and owls eyes glow red, while raccoons and rabbits exhibit a yellow eyeshine. Humans don’t have a tapetum lucidum so they don’t exhibit eyeshine. "

― Carolyn Jourdan , Dangerous Beauty: Encounters with Grizzlies and Bison in Yellowstone