A UV light, the nemesis of the desert scorpion.  Typically in the desert these critters hide themselves well in the bushes of the Owens Valley near Big Pine, California.  But shine a light at night & you're guaranteed to find one within 10 seconds, usually popping out as a bright green glow hiding under the bushes.  In fact they are quite abundant here.  This near-ground view shows a specimen of Hadrurus spadix no more than 2.5 inches in length that I quickly snagged after merely driving a dirt road without headlights while shining my UV light.  I duplicated the same specimen for this shot & had to re-capture it several times as the clicker of my camera was strong enough to vibrate the soil to which scorpions often react to when detecting either any threats or potential prey.  I was initially taking the UV light out for a patrol of the grounds to see what fluorescent minerals I could find, of which there were plenty however nothing really popped out.  Most orange/white mineral colors are a layer of crusted calcium carbonate over the alluvium - sometimes bright green is indicative of traces of uranium.

The UV light I have is both short & long wave.  Insects including a praying mantis were attracted to it within minutes.  Turns out the first night I camped here there was a scorpion three feet from me however its clear body was laying flat & I never once saw it with a regular flashlight.  Not my best stitching - I had to race capturing this as the moon was about to rise within an hour.  The only thing that would've completed this panorama would have been a full view of the constellation Scorpius - only half of it is visible hovering over the Sierra Nevada.