When the rain stopped temporarily after 4.5 inches today, I went out to empty some soggy pots on the deck. On a pansy plant was a pair of mating flies. The camera was not all that handy, but they were busy and accommodated me (and each other). As I approached, they flew to the deck rail but I was able to get this picture.
If my research is correct, the huge red eyes and grey stripes on the back identify them as a species of flesh-fly. The female will hatch the eggs in her uterus and then give birth to larvae on a carcass, or occasionally, in an open wound of a human or animal. The larvae will feed off the flesh, thus the name.
A fascinating aside is that the life cycle of these flies has been so well researched that forensic investigators can use them to determine a date of death on a body found.