“…This phenomenon arises in biological organisms, the integuments of which contain so-called fluorophores [ 55 , 56 ]. Examples include birds [ 44 , 57 , 58 , 59 ], insects [ 60 , 61 , 62 , 63 , 64 , 65 , 66 , 67 , 68 , 69 , 70 , 71 ], arachnids [ 72 , 73 ], mammals [ 74 ], amphibians [ 75 , 76 ], reptiles [ 77 ], marine animals [ 78 , 79 ], and plants [ 80 , 81 ] ( Figure 2 ). These molecules emit longer-wavelength light (typically, visible photons) following the absorption of incident shorter-wavelength light (typically, UV, violet or blue photons).…”