Photoluminescent Bat Toes

This exercise is a part of Educator Guide: Lava Lamp Star and Glowing Bat Toes / View Guide
The very hairy back feet of a Mexican free-tailed bat light up under ultraviolet light. This image shows just the back half of a bat next to a ruler for scale.
Under an ultraviolet light, toe structures on this Mexican free-tailed bat glow a brilliant cyan.