These two spots emit green light. Moreover ... change colors depending on the angle of view. So, these bugs appear to have ...

Insects see light wavelengths (colours) differently to us. They can see ultraviolet (UV), green and blue lights best. Red and infrared light are invisible to them, and they can't see yellow and orange ...

Many southern homes sport light blue painted porch ceilings to deter unwanted insects and spirits, so we asked an entomologist to find out if it actually works.