About Chrysops niger Macquart, 1838
Chrysops niger, commonly known as the black deer fly, is a species of fly first described by Macquart in 1838. Adult black deer flies reach a length of 8 to 10.5 millimetres (0.31 to 0.41 inches). They have a mostly black body covered in some white hairs, and their wings bear distinct black bars. Adults are active from May through September, and are typically found around marsh areas. The larvae of this species feed on organic matter in damp soil, and are classified as hydrobionts because they live in habitats with high water content. This species is distributed across the eastern United States and Canada.
