Males and females are both completely black, but males have huge eyes that touch each other at the center of the face; the eyes of females are separated. It's the size of the eyes that strikes curiosity in most people that see them. The color of the eyes may vary depending on the lighting. Facets comprising each eye reflect light, so sometimes their eyes appear black, sometimes silver (see photo gallery) and sometimes shades of their surroundings.
This species is found in the eastern part of the continent. Females lay fertilized eggs on or near water sources. Maggots (larvae) feed on other aquatic insects and worms.