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Re: Discovery tonight ... 8 pm

 "Flying reptile Quetzalcoatlus...Howard also notes that the creatures
 had tremendous eyesight, seeing in ultraviolet to following[sic] the
 urine trails of its prey."



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.