Don, the 2nd son wrote:
I enjoy photographing these cute buggers. TINY is what they are. Size of a grain of rice. My grandson was exploring youtube videos, showed me one in which a poster described these tiny harmless critters as something that would/could attack and bite you! FAKE NEWS!! If you were reborn as an aphid, welll maybe but they are friendly to humans.
They are amazing, fast as lightning, pinpoint hunters though, fascinating to watch. Fast forward to around 0:30.