"Flying reptile Quetzalcoatlus...Howard also notes that the creatures had tremendous eyesight, seeing in ultraviolet to following[sic] the urine trails of its prey." ... What?
That's what extant raptors do with rodents: urine, or at least rodent urine, absorbs UV and is therefore bright ultra-yellow. Seeing UV is plesiomorphic for at least Osteichthyes, so it's reasonable to assume that pterosaurs in general and *Q.* in particular retained this capability... but stating as a matter of fact that they used it this way... two words: Faux Noise.