Orthetrum chrysostigma, the epaulet skimmer, is a species of dragonfly in the family Libellulidae. It is found in Algeria, Angola, Benin, Botswana, Burkina Faso, Cameroon, Central African Republic, Chad, the Democratic Republic of the Congo, Ivory Coast, Egypt, Equatorial Guinea, Ethiopia, Gambia, Ghana, Guinea, Israel, Kenya, Liberia, Libya, Malawi, Mali, Mauritania, Morocco, Mozambique, Namibia, Niger, Nigeria, Senegal, Sierra Leone, Somalia, South Africa, Sudan, Tanzania, Togo, Uganda, Zambia, Zimbabwe, and possibly Burundi as well as Canary Islands, and Portugal. It was recorded in the Maltese Islands in 2010.
Both sexes of the Epaulet Skimmer are among the more easily recognised Orthetrum species, due to the single diagonal stripe on the sides of the thorax. Fully pruinose males, however, are hard to identify and are best told by the distinctive shape of the secondary genitalia.
The Epaulet Skimmer is most similar to the closely related Two-striped Skimmer (Orthetrum caffrum), but that species has a darker, browner thorax with two, pale diagonal stripes on the sides.
The Epaulet Skimmer frequents a wide range of freshwater habitats, including Rivers, streams, lakes, pans, dams, and water-holes. It prefers sites that are fairly open with exposed rocks, sand, or gravel. The Epaulet Skimmer is most numerous along rivers in the savanna regions.
The Epaulet Skimmer often perches on the ground, but also on rocks and exposed stems and twigs. It hunts from a perch with a rapid, darting flight. Frequently returns to the same perch. Both sexes can be found in the same vicinity.
The Epaulet Skimmer is common and widespread in South Africa. It is listed as of Least Concern in the IUCN Red List of Threatened Species. The Epaulet Skimmer is fairly resistant to habitat damage and is often common at man-made and degraded sites.
