Can Ruffed Lemurs See Red?
Ruffed lemurs are usually colorblind—all males are—but some females can see something the others can’t: the color red. But how do you ask a lemur to tell you what they see? Learn about Raymond Vagell’s color vision research at Duke Lemur Center. He asks lemurs to show him whether they can see red using a touchscreen.
Credits: Duke Lemur Center