Widow skimmers are also very colorful with both male and female having large black wing patches. In the two photos above the top one is a male. The male is identified by the white wing patches near the ends of the wings. Notice the female in the second photo just has the black wing patches and no white. The male in the first photo has most likely emerged rather recently. I can tell this because he still has yellow stripes showing at the end of his abdomen. As widow skimmer males age their abdomen gets covered with a chalky substance called pruinose. This will eventually cover the side spots and make the whole abdomen appear a slate blue color.